Finding the Fourth Proportional to 8,130.30, 12,171.69 and 7,352.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,130.30 : 12,171.69 = 7,352.10 : x
2. Step 2: Convert to fraction form
   8,130.30/12,171.69 = 7,352.10/x
3. Step 3: Cross multiply
   8,130.30x = 12,171.69 × 7,352.10
4. Step 4: Simplify right side
   8,130.30x = 89,487,482.05
5. Step 5: Solve for x
   x = 89,487,482.05/8,130.30
6. Step 6: Final answer
   x = 11,006.66