Finding the Fourth Proportional to 2,506.55, 3,757.59 and 861.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,506.55 : 3,757.59 = 861.94 : x
2. Step 2: Convert to fraction form
   2,506.55/3,757.59 = 861.94/x
3. Step 3: Cross multiply
   2,506.55x = 3,757.59 × 861.94
4. Step 4: Simplify right side
   2,506.55x = 3,238,821.82
5. Step 5: Solve for x
   x = 3,238,821.82/2,506.55
6. Step 6: Final answer
   x = 1,292.15