Finding the Fourth Proportional to 1,480.79, 2,043.61 and 921.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,480.79 : 2,043.61 = 921.29 : x
2. Step 2: Convert to fraction form
   1,480.79/2,043.61 = 921.29/x
3. Step 3: Cross multiply
   1,480.79x = 2,043.61 × 921.29
4. Step 4: Simplify right side
   1,480.79x = 1,882,757.46
5. Step 5: Solve for x
   x = 1,882,757.46/1,480.79
6. Step 6: Final answer
   x = 1,271.45