Finding the Fourth Proportional to 2,613.18, 3,920.34 and 881.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,613.18 : 3,920.34 = 881.76 : x
2. Step 2: Convert to fraction form
   2,613.18/3,920.34 = 881.76/x
3. Step 3: Cross multiply
   2,613.18x = 3,920.34 × 881.76
4. Step 4: Simplify right side
   2,613.18x = 3,456,799.00
5. Step 5: Solve for x
   x = 3,456,799.00/2,613.18
6. Step 6: Final answer
   x = 1,322.83