Finding the Fourth Proportional to 8,131.80, 12,173.94 and 7,353.60

Step by Step Solution

1. Step 1: Write the proportion equation
   8,131.80 : 12,173.94 = 7,353.60 : x
2. Step 2: Convert to fraction form
   8,131.80/12,173.94 = 7,353.60/x
3. Step 3: Cross multiply
   8,131.80x = 12,173.94 × 7,353.60
4. Step 4: Simplify right side
   8,131.80x = 89,522,285.18
5. Step 5: Solve for x
   x = 89,522,285.18/8,131.80
6. Step 6: Final answer
   x = 11,008.91