Finding the Fourth Proportional to 1,071.75, 1,480.23 and 721.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,071.75 : 1,480.23 = 721.83 : x
2. Step 2: Convert to fraction form
   1,071.75/1,480.23 = 721.83/x
3. Step 3: Cross multiply
   1,071.75x = 1,480.23 × 721.83
4. Step 4: Simplify right side
   1,071.75x = 1,068,474.42
5. Step 5: Solve for x
   x = 1,068,474.42/1,071.75
6. Step 6: Final answer
   x = 996.94