Finding the Fourth Proportional to 2,500.85, 3,750.03 and 856.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,500.85 : 3,750.03 = 856.82 : x
2. Step 2: Convert to fraction form
   2,500.85/3,750.03 = 856.82/x
3. Step 3: Cross multiply
   2,500.85x = 3,750.03 × 856.82
4. Step 4: Simplify right side
   2,500.85x = 3,213,100.70
5. Step 5: Solve for x
   x = 3,213,100.70/2,500.85
6. Step 6: Final answer
   x = 1,284.80