Finding the Fourth Proportional to 9,137.58, 12,610.98 and 5,158.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,137.58 : 12,610.98 = 5,158.86 : x
2. Step 2: Convert to fraction form
   9,137.58/12,610.98 = 5,158.86/x
3. Step 3: Cross multiply
   9,137.58x = 12,610.98 × 5,158.86
4. Step 4: Simplify right side
   9,137.58x = 65,058,280.28
5. Step 5: Solve for x
   x = 65,058,280.28/9,137.58
6. Step 6: Final answer
   x = 7,119.86