Finding the Fourth Proportional to 2,506.30, 3,755.30 and 861.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,506.30 : 3,755.30 = 861.94 : x
2. Step 2: Convert to fraction form
   2,506.30/3,755.30 = 861.94/x
3. Step 3: Cross multiply
   2,506.30x = 3,755.30 × 861.94
4. Step 4: Simplify right side
   2,506.30x = 3,236,843.28
5. Step 5: Solve for x
   x = 3,236,843.28/2,506.30
6. Step 6: Final answer
   x = 1,291.48