Finding the Fourth Proportional to 9,036.05, 12,469.82 and 5,057.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,036.05 : 12,469.82 = 5,057.15 : x
2. Step 2: Convert to fraction form
   9,036.05/12,469.82 = 5,057.15/x
3. Step 3: Cross multiply
   9,036.05x = 12,469.82 × 5,057.15
4. Step 4: Simplify right side
   9,036.05x = 63,061,785.69
5. Step 5: Solve for x
   x = 63,061,785.69/9,036.05
6. Step 6: Final answer
   x = 6,978.91