Finding the Fourth Proportional to 2,321.31, 3,480.31 and 1,088.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,321.31 : 3,480.31 = 1,088.04 : x
2. Step 2: Convert to fraction form
   2,321.31/3,480.31 = 1,088.04/x
3. Step 3: Cross multiply
   2,321.31x = 3,480.31 × 1,088.04
4. Step 4: Simplify right side
   2,321.31x = 3,786,711.05
5. Step 5: Solve for x
   x = 3,786,711.05/2,321.31
6. Step 6: Final answer
   x = 1,631.29