Finding the Fourth Proportional to 2,636.43, 3,953.35 and 880.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.43 : 3,953.35 = 880.83 : x
2. Step 2: Convert to fraction form
   2,636.43/3,953.35 = 880.83/x
3. Step 3: Cross multiply
   2,636.43x = 3,953.35 × 880.83
4. Step 4: Simplify right side
   2,636.43x = 3,482,229.28
5. Step 5: Solve for x
   x = 3,482,229.28/2,636.43
6. Step 6: Final answer
   x = 1,320.81