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Finding the Fourth Proportional to 15,912.70, 21,958.90 and 8,839.57

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Solution

The fourth proportional to 15,912.70, 21,958.90 and 8,839.57 is: 12,198.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,912.70 : 21,958.90 = 8,839.57 : x
  2. Step 2: Convert to fraction form
    15,912.70/21,958.90 = 8,839.57/x
  3. Step 3: Cross multiply
    15,912.70x = 21,958.90 × 8,839.57
  4. Step 4: Simplify right side
    15,912.70x = 194,107,233.67
  5. Step 5: Solve for x
    x = 194,107,233.67/15,912.70
  6. Step 6: Final answer
    x = 12,198.26

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