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Finding the Fourth Proportional to 1,319,707.80, 1,978,759.80 and 520,067.70

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Solution

The fourth proportional to 1,319,707.80, 1,978,759.80 and 520,067.70 is: 779,785.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,707.80 : 1,978,759.80 = 520,067.70 : x
  2. Step 2: Convert to fraction form
    1,319,707.80/1,978,759.80 = 520,067.70/x
  3. Step 3: Cross multiply
    1,319,707.80x = 1,978,759.80 × 520,067.70
  4. Step 4: Simplify right side
    1,319,707.80x = 1,029,089,058,038.46
  5. Step 5: Solve for x
    x = 1,029,089,058,038.46/1,319,707.80
  6. Step 6: Final answer
    x = 779,785.54

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