Finding the Fourth Proportional to 15,451.61, 21,321.88 and 8,737.52

Step by Step Solution

1. Step 1: Write the proportion equation
   15,451.61 : 21,321.88 = 8,737.52 : x
2. Step 2: Convert to fraction form
   15,451.61/21,321.88 = 8,737.52/x
3. Step 3: Cross multiply
   15,451.61x = 21,321.88 × 8,737.52
4. Step 4: Simplify right side
   15,451.61x = 186,300,393.57
5. Step 5: Solve for x
   x = 186,300,393.57/15,451.61
6. Step 6: Final answer
   x = 12,057.02