Finding the Fourth Proportional to 2,331.90, 3,498.45 and 871.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,331.90 : 3,498.45 = 871.06 : x
2. Step 2: Convert to fraction form
   2,331.90/3,498.45 = 871.06/x
3. Step 3: Cross multiply
   2,331.90x = 3,498.45 × 871.06
4. Step 4: Simplify right side
   2,331.90x = 3,047,359.86
5. Step 5: Solve for x
   x = 3,047,359.86/2,331.90
6. Step 6: Final answer
   x = 1,306.81