Finding the Fourth Proportional to 15,414.30, 21,271.82 and 8,700.21

Step by Step Solution

1. Step 1: Write the proportion equation
   15,414.30 : 21,271.82 = 8,700.21 : x
2. Step 2: Convert to fraction form
   15,414.30/21,271.82 = 8,700.21/x
3. Step 3: Cross multiply
   15,414.30x = 21,271.82 × 8,700.21
4. Step 4: Simplify right side
   15,414.30x = 185,069,216.47
5. Step 5: Solve for x
   x = 185,069,216.47/15,414.30
6. Step 6: Final answer
   x = 12,006.34