Finding the Fourth Proportional to 14,142.32, 19,507.42 and 8,689

Step by Step Solution

1. Step 1: Write the proportion equation
   14,142.32 : 19,507.42 = 8,689 : x
2. Step 2: Convert to fraction form
   14,142.32/19,507.42 = 8,689/x
3. Step 3: Cross multiply
   14,142.32x = 19,507.42 × 8,689
4. Step 4: Simplify right side
   14,142.32x = 169,499,972.38
5. Step 5: Solve for x
   x = 169,499,972.38/14,142.32
6. Step 6: Final answer
   x = 11,985.30