Finding the Fourth Proportional to 2,613.34, 3,917.58 and 880.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,613.34 : 3,917.58 = 880.75 : x
2. Step 2: Convert to fraction form
   2,613.34/3,917.58 = 880.75/x
3. Step 3: Cross multiply
   2,613.34x = 3,917.58 × 880.75
4. Step 4: Simplify right side
   2,613.34x = 3,450,408.59
5. Step 5: Solve for x
   x = 3,450,408.59/2,613.34
6. Step 6: Final answer
   x = 1,320.31