Finding the Fourth Proportional to 2,612.25, 3,919.39 and 880.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612.25 : 3,919.39 = 880.88 : x
2. Step 2: Convert to fraction form
   2,612.25/3,919.39 = 880.88/x
3. Step 3: Cross multiply
   2,612.25x = 3,919.39 × 880.88
4. Step 4: Simplify right side
   2,612.25x = 3,452,490.46
5. Step 5: Solve for x
   x = 3,452,490.46/2,612.25
6. Step 6: Final answer
   x = 1,321.65