Finding the Fourth Proportional to 2,185.52, 3,278.52 and 724.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.52 : 3,278.52 = 724.77 : x
2. Step 2: Convert to fraction form
   2,185.52/3,278.52 = 724.77/x
3. Step 3: Cross multiply
   2,185.52x = 3,278.52 × 724.77
4. Step 4: Simplify right side
   2,185.52x = 2,376,172.94
5. Step 5: Solve for x
   x = 2,376,172.94/2,185.52
6. Step 6: Final answer
   x = 1,087.24