Finding the Fourth Proportional to 9,137.32, 12,609.54 and 5,158.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,137.32 : 12,609.54 = 5,158.48 : x
2. Step 2: Convert to fraction form
   9,137.32/12,609.54 = 5,158.48/x
3. Step 3: Cross multiply
   9,137.32x = 12,609.54 × 5,158.48
4. Step 4: Simplify right side
   9,137.32x = 65,046,059.90
5. Step 5: Solve for x
   x = 65,046,059.90/9,137.32
6. Step 6: Final answer
   x = 7,118.72