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Finding the Fourth Proportional to 17,571.72, 26,361.90 and 12,387.72

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Solution

The fourth proportional to 17,571.72, 26,361.90 and 12,387.72 is: 18,584.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,571.72 : 26,361.90 = 12,387.72 : x
  2. Step 2: Convert to fraction form
    17,571.72/26,361.90 = 12,387.72/x
  3. Step 3: Cross multiply
    17,571.72x = 26,361.90 × 12,387.72
  4. Step 4: Simplify right side
    17,571.72x = 326,563,835.87
  5. Step 5: Solve for x
    x = 326,563,835.87/17,571.72
  6. Step 6: Final answer
    x = 18,584.63

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