Finding the Fourth Proportional to 9,108.79, 12,567.22 and 5,129.13

Step by Step Solution

1. Step 1: Write the proportion equation
   9,108.79 : 12,567.22 = 5,129.13 : x
2. Step 2: Convert to fraction form
   9,108.79/12,567.22 = 5,129.13/x
3. Step 3: Cross multiply
   9,108.79x = 12,567.22 × 5,129.13
4. Step 4: Simplify right side
   9,108.79x = 64,458,892.30
5. Step 5: Solve for x
   x = 64,458,892.30/9,108.79
6. Step 6: Final answer
   x = 7,076.56