Finding the Fourth Proportional to 1,599.82, 2,397.71 and 721.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,599.82 : 2,397.71 = 721.39 : x
2. Step 2: Convert to fraction form
   1,599.82/2,397.71 = 721.39/x
3. Step 3: Cross multiply
   1,599.82x = 2,397.71 × 721.39
4. Step 4: Simplify right side
   1,599.82x = 1,729,684.02
5. Step 5: Solve for x
   x = 1,729,684.02/1,599.82
6. Step 6: Final answer
   x = 1,081.17