Finding the Fourth Proportional to 2,752.41, 4,128.66 and 903.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,752.41 : 4,128.66 = 903.72 : x
2. Step 2: Convert to fraction form
   2,752.41/4,128.66 = 903.72/x
3. Step 3: Cross multiply
   2,752.41x = 4,128.66 × 903.72
4. Step 4: Simplify right side
   2,752.41x = 3,731,152.62
5. Step 5: Solve for x
   x = 3,731,152.62/2,752.41
6. Step 6: Final answer
   x = 1,355.59