Finding the Fourth Proportional to 15,737.34, 21,717.54 and 8,663.61

Step by Step Solution

1. Step 1: Write the proportion equation
   15,737.34 : 21,717.54 = 8,663.61 : x
2. Step 2: Convert to fraction form
   15,737.34/21,717.54 = 8,663.61/x
3. Step 3: Cross multiply
   15,737.34x = 21,717.54 × 8,663.61
4. Step 4: Simplify right side
   15,737.34x = 188,152,296.72
5. Step 5: Solve for x
   x = 188,152,296.72/15,737.34
6. Step 6: Final answer
   x = 11,955.79