Finding the Fourth Proportional to 1,480.59, 2,043.16 and 921.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,480.59 : 2,043.16 = 921.15 : x
2. Step 2: Convert to fraction form
   1,480.59/2,043.16 = 921.15/x
3. Step 3: Cross multiply
   1,480.59x = 2,043.16 × 921.15
4. Step 4: Simplify right side
   1,480.59x = 1,882,054.53
5. Step 5: Solve for x
   x = 1,882,054.53/1,480.59
6. Step 6: Final answer
   x = 1,271.15