Finding the Fourth Proportional to 1,469.92, 2,200.20 and 922.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,469.92 : 2,200.20 = 922.72 : x
2. Step 2: Convert to fraction form
   1,469.92/2,200.20 = 922.72/x
3. Step 3: Cross multiply
   1,469.92x = 2,200.20 × 922.72
4. Step 4: Simplify right side
   1,469.92x = 2,030,168.54
5. Step 5: Solve for x
   x = 2,030,168.54/1,469.92
6. Step 6: Final answer
   x = 1,381.14