Finding the Fourth Proportional to 1,480.72, 2,043.37 and 817.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,480.72 : 2,043.37 = 817.57 : x
2. Step 2: Convert to fraction form
   1,480.72/2,043.37 = 817.57/x
3. Step 3: Cross multiply
   1,480.72x = 2,043.37 × 817.57
4. Step 4: Simplify right side
   1,480.72x = 1,670,598.01
5. Step 5: Solve for x
   x = 1,670,598.01/1,480.72
6. Step 6: Final answer
   x = 1,128.23