Finding the Fourth Proportional to 9,036.15, 12,469.91 and 5,057.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,036.15 : 12,469.91 = 5,057.25 : x
2. Step 2: Convert to fraction form
   9,036.15/12,469.91 = 5,057.25/x
3. Step 3: Cross multiply
   9,036.15x = 12,469.91 × 5,057.25
4. Step 4: Simplify right side
   9,036.15x = 63,063,452.35
5. Step 5: Solve for x
   x = 63,063,452.35/9,036.15
6. Step 6: Final answer
   x = 6,979.02