Finding the Fourth Proportional to 2,200.72, 3,302.32 and 903.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,200.72 : 3,302.32 = 903.12 : x
2. Step 2: Convert to fraction form
   2,200.72/3,302.32 = 903.12/x
3. Step 3: Cross multiply
   2,200.72x = 3,302.32 × 903.12
4. Step 4: Simplify right side
   2,200.72x = 2,982,391.24
5. Step 5: Solve for x
   x = 2,982,391.24/2,200.72
6. Step 6: Final answer
   x = 1,355.19