Finding the Fourth Proportional to 2,500.85, 3,747.16 and 856.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,500.85 : 3,747.16 = 856.49 : x
2. Step 2: Convert to fraction form
   2,500.85/3,747.16 = 856.49/x
3. Step 3: Cross multiply
   2,500.85x = 3,747.16 × 856.49
4. Step 4: Simplify right side
   2,500.85x = 3,209,412.30
5. Step 5: Solve for x
   x = 3,209,412.30/2,500.85
6. Step 6: Final answer
   x = 1,283.33