Finding the Fourth Proportional to 2,331.72, 3,498.23 and 771.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,331.72 : 3,498.23 = 771.86 : x
2. Step 2: Convert to fraction form
   2,331.72/3,498.23 = 771.86/x
3. Step 3: Cross multiply
   2,331.72x = 3,498.23 × 771.86
4. Step 4: Simplify right side
   2,331.72x = 2,700,154.48
5. Step 5: Solve for x
   x = 2,700,154.48/2,331.72
6. Step 6: Final answer
   x = 1,158.01