Finding the Fourth Proportional to 2,526.59, 3,790.29 and 860.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,526.59 : 3,790.29 = 860.86 : x
2. Step 2: Convert to fraction form
   2,526.59/3,790.29 = 860.86/x
3. Step 3: Cross multiply
   2,526.59x = 3,790.29 × 860.86
4. Step 4: Simplify right side
   2,526.59x = 3,262,899.57
5. Step 5: Solve for x
   x = 3,262,899.57/2,526.59
6. Step 6: Final answer
   x = 1,291.43