Finding the Fourth Proportional to 9,153.59, 12,631.05 and 5,173.92

Step by Step Solution

1. Step 1: Write the proportion equation
   9,153.59 : 12,631.05 = 5,173.92 : x
2. Step 2: Convert to fraction form
   9,153.59/12,631.05 = 5,173.92/x
3. Step 3: Cross multiply
   9,153.59x = 12,631.05 × 5,173.92
4. Step 4: Simplify right side
   9,153.59x = 65,352,042.22
5. Step 5: Solve for x
   x = 65,352,042.22/9,153.59
6. Step 6: Final answer
   x = 7,139.50