Finding the Fourth Proportional to 2,072.24, 3,108.72 and 902.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.24 : 3,108.72 = 902.96 : x
2. Step 2: Convert to fraction form
   2,072.24/3,108.72 = 902.96/x
3. Step 3: Cross multiply
   2,072.24x = 3,108.72 × 902.96
4. Step 4: Simplify right side
   2,072.24x = 2,807,049.81
5. Step 5: Solve for x
   x = 2,807,049.81/2,072.24
6. Step 6: Final answer
   x = 1,354.60