Finding the Fourth Proportional to 2,505.48, 3,758.48 and 861.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,505.48 : 3,758.48 = 861.83 : x
2. Step 2: Convert to fraction form
   2,505.48/3,758.48 = 861.83/x
3. Step 3: Cross multiply
   2,505.48x = 3,758.48 × 861.83
4. Step 4: Simplify right side
   2,505.48x = 3,239,170.82
5. Step 5: Solve for x
   x = 3,239,170.82/2,505.48
6. Step 6: Final answer
   x = 1,292.83