Finding the Fourth Proportional to 1,444.92, 1,992.96 and 921.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,444.92 : 1,992.96 = 921.72 : x
2. Step 2: Convert to fraction form
   1,444.92/1,992.96 = 921.72/x
3. Step 3: Cross multiply
   1,444.92x = 1,992.96 × 921.72
4. Step 4: Simplify right side
   1,444.92x = 1,836,951.09
5. Step 5: Solve for x
   x = 1,836,951.09/1,444.92
6. Step 6: Final answer
   x = 1,271.32