Finding the Fourth Proportional to 9,138.24, 12,610.98 and 5,158.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,138.24 : 12,610.98 = 5,158.98 : x
2. Step 2: Convert to fraction form
   9,138.24/12,610.98 = 5,158.98/x
3. Step 3: Cross multiply
   9,138.24x = 12,610.98 × 5,158.98
4. Step 4: Simplify right side
   9,138.24x = 65,059,793.60
5. Step 5: Solve for x
   x = 65,059,793.60/9,138.24
6. Step 6: Final answer
   x = 7,119.51