Finding the Fourth Proportional to 9,152.49, 12,630.38 and 5,173.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,152.49 : 12,630.38 = 5,173.60 : x
2. Step 2: Convert to fraction form
   9,152.49/12,630.38 = 5,173.60/x
3. Step 3: Cross multiply
   9,152.49x = 12,630.38 × 5,173.60
4. Step 4: Simplify right side
   9,152.49x = 65,344,493.78
5. Step 5: Solve for x
   x = 65,344,493.78/9,152.49
6. Step 6: Final answer
   x = 7,139.53