Finding the Fourth Proportional to 8,700.39, 13,057.52 and 3,155.33

Step by Step Solution

1. Step 1: Write the proportion equation
   8,700.39 : 13,057.52 = 3,155.33 : x
2. Step 2: Convert to fraction form
   8,700.39/13,057.52 = 3,155.33/x
3. Step 3: Cross multiply
   8,700.39x = 13,057.52 × 3,155.33
4. Step 4: Simplify right side
   8,700.39x = 41,200,703.52
5. Step 5: Solve for x
   x = 41,200,703.52/8,700.39
6. Step 6: Final answer
   x = 4,735.50