Finding the Fourth Proportional to 1,480.92, 2,043.72 and 921.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,480.92 : 2,043.72 = 921.45 : x
2. Step 2: Convert to fraction form
   1,480.92/2,043.72 = 921.45/x
3. Step 3: Cross multiply
   1,480.92x = 2,043.72 × 921.45
4. Step 4: Simplify right side
   1,480.92x = 1,883,185.79
5. Step 5: Solve for x
   x = 1,883,185.79/1,480.92
6. Step 6: Final answer
   x = 1,271.63