Finding the Fourth Proportional to 2,365.31, 3,547.82 and 721.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,365.31 : 3,547.82 = 721.71 : x
2. Step 2: Convert to fraction form
   2,365.31/3,547.82 = 721.71/x
3. Step 3: Cross multiply
   2,365.31x = 3,547.82 × 721.71
4. Step 4: Simplify right side
   2,365.31x = 2,560,498.98
5. Step 5: Solve for x
   x = 2,560,498.98/2,365.31
6. Step 6: Final answer
   x = 1,082.52