Finding the Fourth Proportional to 2,505.41, 3,758.56 and 861.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,505.41 : 3,758.56 = 861.59 : x
2. Step 2: Convert to fraction form
   2,505.41/3,758.56 = 861.59/x
3. Step 3: Cross multiply
   2,505.41x = 3,758.56 × 861.59
4. Step 4: Simplify right side
   2,505.41x = 3,238,337.71
5. Step 5: Solve for x
   x = 3,238,337.71/2,505.41
6. Step 6: Final answer
   x = 1,292.54