Finding the Fourth Proportional to 8,330.52, 12,471.48 and 7,216.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,330.52 : 12,471.48 = 7,216.50 : x
2. Step 2: Convert to fraction form
   8,330.52/12,471.48 = 7,216.50/x
3. Step 3: Cross multiply
   8,330.52x = 12,471.48 × 7,216.50
4. Step 4: Simplify right side
   8,330.52x = 90,000,435.42
5. Step 5: Solve for x
   x = 90,000,435.42/8,330.52
6. Step 6: Final answer
   x = 10,803.70