Finding the Fourth Proportional to 2,400.72, 3,599.48 and 861.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,400.72 : 3,599.48 = 861.52 : x
2. Step 2: Convert to fraction form
   2,400.72/3,599.48 = 861.52/x
3. Step 3: Cross multiply
   2,400.72x = 3,599.48 × 861.52
4. Step 4: Simplify right side
   2,400.72x = 3,101,024.01
5. Step 5: Solve for x
   x = 3,101,024.01/2,400.72
6. Step 6: Final answer
   x = 1,291.71