Finding the Fourth Proportional to 15,570.24, 21,487.20 and 8,496.72

Step by Step Solution

1. Step 1: Write the proportion equation
   15,570.24 : 21,487.20 = 8,496.72 : x
2. Step 2: Convert to fraction form
   15,570.24/21,487.20 = 8,496.72/x
3. Step 3: Cross multiply
   15,570.24x = 21,487.20 × 8,496.72
4. Step 4: Simplify right side
   15,570.24x = 182,570,721.98
5. Step 5: Solve for x
   x = 182,570,721.98/15,570.24
6. Step 6: Final answer
   x = 11,725.62