Finding the Fourth Proportional to 1,445.04, 1,995.71 and 921.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.04 : 1,995.71 = 921.38 : x
2. Step 2: Convert to fraction form
   1,445.04/1,995.71 = 921.38/x
3. Step 3: Cross multiply
   1,445.04x = 1,995.71 × 921.38
4. Step 4: Simplify right side
   1,445.04x = 1,838,792.69
5. Step 5: Solve for x
   x = 1,838,792.69/1,445.04
6. Step 6: Final answer
   x = 1,272.49