Finding the Fourth Proportional to 12,715.56, 17,553.24 and 8,184.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,715.56 : 17,553.24 = 8,184.78 : x
2. Step 2: Convert to fraction form
   12,715.56/17,553.24 = 8,184.78/x
3. Step 3: Cross multiply
   12,715.56x = 17,553.24 × 8,184.78
4. Step 4: Simplify right side
   12,715.56x = 143,669,407.69
5. Step 5: Solve for x
   x = 143,669,407.69/12,715.56
6. Step 6: Final answer
   x = 11,298.71