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Finding the Fourth Proportional to 68,428.95, 102,604.23 and 21,031.71

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Solution

The fourth proportional to 68,428.95, 102,604.23 and 21,031.71 is: 31,535.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,428.95 : 102,604.23 = 21,031.71 : x
  2. Step 2: Convert to fraction form
    68,428.95/102,604.23 = 21,031.71/x
  3. Step 3: Cross multiply
    68,428.95x = 102,604.23 × 21,031.71
  4. Step 4: Simplify right side
    68,428.95x = 2,157,942,410.13
  5. Step 5: Solve for x
    x = 2,157,942,410.13/68,428.95
  6. Step 6: Final answer
    x = 31,535.52

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