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Finding the Fourth Proportional to 19,321.60, 28,982.40 and 5,470.72

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Solution

The fourth proportional to 19,321.60, 28,982.40 and 5,470.72 is: 8,206.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,321.60 : 28,982.40 = 5,470.72 : x
  2. Step 2: Convert to fraction form
    19,321.60/28,982.40 = 5,470.72/x
  3. Step 3: Cross multiply
    19,321.60x = 28,982.40 × 5,470.72
  4. Step 4: Simplify right side
    19,321.60x = 158,554,595.33
  5. Step 5: Solve for x
    x = 158,554,595.33/19,321.60
  6. Step 6: Final answer
    x = 8,206.08

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