Finding the Fourth Proportional to 2,505.30, 3,757.82 and 861.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,505.30 : 3,757.82 = 861.68 : x
2. Step 2: Convert to fraction form
   2,505.30/3,757.82 = 861.68/x
3. Step 3: Cross multiply
   2,505.30x = 3,757.82 × 861.68
4. Step 4: Simplify right side
   2,505.30x = 3,238,038.34
5. Step 5: Solve for x
   x = 3,238,038.34/2,505.30
6. Step 6: Final answer
   x = 1,292.48