Finding the Fourth Proportional to 2,851.57, 4,277.29 and 903.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,851.57 : 4,277.29 = 903.72 : x
2. Step 2: Convert to fraction form
   2,851.57/4,277.29 = 903.72/x
3. Step 3: Cross multiply
   2,851.57x = 4,277.29 × 903.72
4. Step 4: Simplify right side
   2,851.57x = 3,865,472.52
5. Step 5: Solve for x
   x = 3,865,472.52/2,851.57
6. Step 6: Final answer
   x = 1,355.56