Finding the Fourth Proportional to 2,386.52, 3,580.10 and 826.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,386.52 : 3,580.10 = 826.10 : x
2. Step 2: Convert to fraction form
   2,386.52/3,580.10 = 826.10/x
3. Step 3: Cross multiply
   2,386.52x = 3,580.10 × 826.10
4. Step 4: Simplify right side
   2,386.52x = 2,957,520.61
5. Step 5: Solve for x
   x = 2,957,520.61/2,386.52
6. Step 6: Final answer
   x = 1,239.26