Finding the Fourth Proportional to 15,572.73, 21,490.88 and 8,499.15

Step by Step Solution

1. Step 1: Write the proportion equation
   15,572.73 : 21,490.88 = 8,499.15 : x
2. Step 2: Convert to fraction form
   15,572.73/21,490.88 = 8,499.15/x
3. Step 3: Cross multiply
   15,572.73x = 21,490.88 × 8,499.15
4. Step 4: Simplify right side
   15,572.73x = 182,654,290.46
5. Step 5: Solve for x
   x = 182,654,290.46/15,572.73
6. Step 6: Final answer
   x = 11,729.11