Finding the Fourth Proportional to 2,500.15, 3,746.12 and 855.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,500.15 : 3,746.12 = 855.80 : x
2. Step 2: Convert to fraction form
   2,500.15/3,746.12 = 855.80/x
3. Step 3: Cross multiply
   2,500.15x = 3,746.12 × 855.80
4. Step 4: Simplify right side
   2,500.15x = 3,205,934.68
5. Step 5: Solve for x
   x = 3,205,934.68/2,500.15
6. Step 6: Final answer
   x = 1,282.30