Finding the Fourth Proportional to 2,752.16, 4,128.89 and 903.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,752.16 : 4,128.89 = 903.43 : x
2. Step 2: Convert to fraction form
   2,752.16/4,128.89 = 903.43/x
3. Step 3: Cross multiply
   2,752.16x = 4,128.89 × 903.43
4. Step 4: Simplify right side
   2,752.16x = 3,730,137.93
5. Step 5: Solve for x
   x = 3,730,137.93/2,752.16
6. Step 6: Final answer
   x = 1,355.35