Finding the Fourth Proportional to 1,445.52, 1,993.86 and 922.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.52 : 1,993.86 = 922.20 : x
2. Step 2: Convert to fraction form
   1,445.52/1,993.86 = 922.20/x
3. Step 3: Cross multiply
   1,445.52x = 1,993.86 × 922.20
4. Step 4: Simplify right side
   1,445.52x = 1,838,737.69
5. Step 5: Solve for x
   x = 1,838,737.69/1,445.52
6. Step 6: Final answer
   x = 1,272.03