Finding the Fourth Proportional to 1,821.72, 2,732.76 and 725.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,821.72 : 2,732.76 = 725.83 : x
2. Step 2: Convert to fraction form
   1,821.72/2,732.76 = 725.83/x
3. Step 3: Cross multiply
   1,821.72x = 2,732.76 × 725.83
4. Step 4: Simplify right side
   1,821.72x = 1,983,505.53
5. Step 5: Solve for x
   x = 1,983,505.53/1,821.72
6. Step 6: Final answer
   x = 1,088.81