Finding the Fourth Proportional to 2,752.29, 4,128.57 and 902.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,752.29 : 4,128.57 = 902.61 : x
2. Step 2: Convert to fraction form
   2,752.29/4,128.57 = 902.61/x
3. Step 3: Cross multiply
   2,752.29x = 4,128.57 × 902.61
4. Step 4: Simplify right side
   2,752.29x = 3,726,488.57
5. Step 5: Solve for x
   x = 3,726,488.57/2,752.29
6. Step 6: Final answer
   x = 1,353.96