Finding the Fourth Proportional to 2,752.74, 4,128.96 and 903.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,752.74 : 4,128.96 = 903.61 : x
2. Step 2: Convert to fraction form
   2,752.74/4,128.96 = 903.61/x
3. Step 3: Cross multiply
   2,752.74x = 4,128.96 × 903.61
4. Step 4: Simplify right side
   2,752.74x = 3,730,969.55
5. Step 5: Solve for x
   x = 3,730,969.55/2,752.74
6. Step 6: Final answer
   x = 1,355.37