Finding the Fourth Proportional to 9,108.05, 12,569.15 and 5,129.23

Step by Step Solution

1. Step 1: Write the proportion equation
   9,108.05 : 12,569.15 = 5,129.23 : x
2. Step 2: Convert to fraction form
   9,108.05/12,569.15 = 5,129.23/x
3. Step 3: Cross multiply
   9,108.05x = 12,569.15 × 5,129.23
4. Step 4: Simplify right side
   9,108.05x = 64,470,061.25
5. Step 5: Solve for x
   x = 64,470,061.25/9,108.05
6. Step 6: Final answer
   x = 7,078.36