Finding the Fourth Proportional to 2,752.31, 4,128.53 and 903.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,752.31 : 4,128.53 = 903.58 : x
2. Step 2: Convert to fraction form
   2,752.31/4,128.53 = 903.58/x
3. Step 3: Cross multiply
   2,752.31x = 4,128.53 × 903.58
4. Step 4: Simplify right side
   2,752.31x = 3,730,442.30
5. Step 5: Solve for x
   x = 3,730,442.30/2,752.31
6. Step 6: Final answer
   x = 1,355.38