Finding the Fourth Proportional to 9,147.88, 12,623.91 and 5,168.90

Step by Step Solution

1. Step 1: Write the proportion equation
   9,147.88 : 12,623.91 = 5,168.90 : x
2. Step 2: Convert to fraction form
   9,147.88/12,623.91 = 5,168.90/x
3. Step 3: Cross multiply
   9,147.88x = 12,623.91 × 5,168.90
4. Step 4: Simplify right side
   9,147.88x = 65,251,734.11
5. Step 5: Solve for x
   x = 65,251,734.11/9,147.88
6. Step 6: Final answer
   x = 7,132.99