Finding the Fourth Proportional to 15,574.56, 21,491.98 and 8,499.56

Step by Step Solution

1. Step 1: Write the proportion equation
   15,574.56 : 21,491.98 = 8,499.56 : x
2. Step 2: Convert to fraction form
   15,574.56/21,491.98 = 8,499.56/x
3. Step 3: Cross multiply
   15,574.56x = 21,491.98 × 8,499.56
4. Step 4: Simplify right side
   15,574.56x = 182,672,373.53
5. Step 5: Solve for x
   x = 182,672,373.53/15,574.56
6. Step 6: Final answer
   x = 11,728.89