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Finding the Fourth Proportional to 39,687.40, 54,766.90 and 21,782.71

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Solution

The fourth proportional to 39,687.40, 54,766.90 and 21,782.71 is: 30,059.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,687.40 : 54,766.90 = 21,782.71 : x
  2. Step 2: Convert to fraction form
    39,687.40/54,766.90 = 21,782.71/x
  3. Step 3: Cross multiply
    39,687.40x = 54,766.90 × 21,782.71
  4. Step 4: Simplify right side
    39,687.40x = 1,192,971,500.30
  5. Step 5: Solve for x
    x = 1,192,971,500.30/39,687.40
  6. Step 6: Final answer
    x = 30,059.20

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