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Finding the Fourth Proportional to 71,908.20, 107,862.30 and 21,988.29

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Solution

The fourth proportional to 71,908.20, 107,862.30 and 21,988.29 is: 32,982.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,908.20 : 107,862.30 = 21,988.29 : x
  2. Step 2: Convert to fraction form
    71,908.20/107,862.30 = 21,988.29/x
  3. Step 3: Cross multiply
    71,908.20x = 107,862.30 × 21,988.29
  4. Step 4: Simplify right side
    71,908.20x = 2,371,707,532.47
  5. Step 5: Solve for x
    x = 2,371,707,532.47/71,908.20
  6. Step 6: Final answer
    x = 32,982.44

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