Finding the Fourth Proportional to 9,158.32, 12,637.94 and 5,179.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,158.32 : 12,637.94 = 5,179.60 : x
2. Step 2: Convert to fraction form
   9,158.32/12,637.94 = 5,179.60/x
3. Step 3: Cross multiply
   9,158.32x = 12,637.94 × 5,179.60
4. Step 4: Simplify right side
   9,158.32x = 65,459,474.02
5. Step 5: Solve for x
   x = 65,459,474.02/9,158.32
6. Step 6: Final answer
   x = 7,147.54