Finding the Fourth Proportional to 15,572.98, 21,490.72 and 8,499.41

Step by Step Solution

1. Step 1: Write the proportion equation
   15,572.98 : 21,490.72 = 8,499.41 : x
2. Step 2: Convert to fraction form
   15,572.98/21,490.72 = 8,499.41/x
3. Step 3: Cross multiply
   15,572.98x = 21,490.72 × 8,499.41
4. Step 4: Simplify right side
   15,572.98x = 182,658,440.48
5. Step 5: Solve for x
   x = 182,658,440.48/15,572.98
6. Step 6: Final answer
   x = 11,729.19