Finding the Fourth Proportional to 2,920.16, 4,380.88 and 868.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,920.16 : 4,380.88 = 868.32 : x
2. Step 2: Convert to fraction form
   2,920.16/4,380.88 = 868.32/x
3. Step 3: Cross multiply
   2,920.16x = 4,380.88 × 868.32
4. Step 4: Simplify right side
   2,920.16x = 3,804,005.72
5. Step 5: Solve for x
   x = 3,804,005.72/2,920.16
6. Step 6: Final answer
   x = 1,302.67