Finding the Fourth Proportional to 2,613.72, 3,920.60 and 883.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,613.72 : 3,920.60 = 883.56 : x
2. Step 2: Convert to fraction form
   2,613.72/3,920.60 = 883.56/x
3. Step 3: Cross multiply
   2,613.72x = 3,920.60 × 883.56
4. Step 4: Simplify right side
   2,613.72x = 3,464,085.34
5. Step 5: Solve for x
   x = 3,464,085.34/2,613.72
6. Step 6: Final answer
   x = 1,325.35