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Finding the Fourth Proportional to 12,922.64, 19,388.82 and 5,136.92

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Solution

The fourth proportional to 12,922.64, 19,388.82 and 5,136.92 is: 7,707.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,922.64 : 19,388.82 = 5,136.92 : x
  2. Step 2: Convert to fraction form
    12,922.64/19,388.82 = 5,136.92/x
  3. Step 3: Cross multiply
    12,922.64x = 19,388.82 × 5,136.92
  4. Step 4: Simplify right side
    12,922.64x = 99,598,817.23
  5. Step 5: Solve for x
    x = 99,598,817.23/12,922.64
  6. Step 6: Final answer
    x = 7,707.31

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