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Finding the Fourth Proportional to 12,689, 19,041 and 7,071.36

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Solution

The fourth proportional to 12,689, 19,041 and 7,071.36 is: 10,611.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,689 : 19,041 = 7,071.36 : x
  2. Step 2: Convert to fraction form
    12,689/19,041 = 7,071.36/x
  3. Step 3: Cross multiply
    12,689x = 19,041 × 7,071.36
  4. Step 4: Simplify right side
    12,689x = 134,645,765.76
  5. Step 5: Solve for x
    x = 134,645,765.76/12,689
  6. Step 6: Final answer
    x = 10,611.22

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