Finding the Fourth Proportional to 8,217.55, 11,329.17 and 5,380.02

Step by Step Solution

1. Step 1: Write the proportion equation
   8,217.55 : 11,329.17 = 5,380.02 : x
2. Step 2: Convert to fraction form
   8,217.55/11,329.17 = 5,380.02/x
3. Step 3: Cross multiply
   8,217.55x = 11,329.17 × 5,380.02
4. Step 4: Simplify right side
   8,217.55x = 60,951,141.01
5. Step 5: Solve for x
   x = 60,951,141.01/8,217.55
6. Step 6: Final answer
   x = 7,417.19