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Finding the Fourth Proportional to 218,846.72, 302,046.72 and 129,428.48

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Solution

The fourth proportional to 218,846.72, 302,046.72 and 129,428.48 is: 178,633.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,846.72 : 302,046.72 = 129,428.48 : x
  2. Step 2: Convert to fraction form
    218,846.72/302,046.72 = 129,428.48/x
  3. Step 3: Cross multiply
    218,846.72x = 302,046.72 × 129,428.48
  4. Step 4: Simplify right side
    218,846.72x = 39,093,447,858.59
  5. Step 5: Solve for x
    x = 39,093,447,858.59/218,846.72
  6. Step 6: Final answer
    x = 178,633.92

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