Finding the Fourth Proportional to 2,610.29, 3,915.42 and 880.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,610.29 : 3,915.42 = 880.13 : x
2. Step 2: Convert to fraction form
   2,610.29/3,915.42 = 880.13/x
3. Step 3: Cross multiply
   2,610.29x = 3,915.42 × 880.13
4. Step 4: Simplify right side
   2,610.29x = 3,446,078.60
5. Step 5: Solve for x
   x = 3,446,078.60/2,610.29
6. Step 6: Final answer
   x = 1,320.19