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Finding the Fourth Proportional to 78,115.57, 107,798.88 and 42,304.75

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Solution

The fourth proportional to 78,115.57, 107,798.88 and 42,304.75 is: 58,380.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,115.57 : 107,798.88 = 42,304.75 : x
  2. Step 2: Convert to fraction form
    78,115.57/107,798.88 = 42,304.75/x
  3. Step 3: Cross multiply
    78,115.57x = 107,798.88 × 42,304.75
  4. Step 4: Simplify right side
    78,115.57x = 4,560,404,668.68
  5. Step 5: Solve for x
    x = 4,560,404,668.68/78,115.57
  6. Step 6: Final answer
    x = 58,380.23

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