Finding the Fourth Proportional to 2,185.47, 3,278.51 and 724.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.47 : 3,278.51 = 724.43 : x
2. Step 2: Convert to fraction form
   2,185.47/3,278.51 = 724.43/x
3. Step 3: Cross multiply
   2,185.47x = 3,278.51 × 724.43
4. Step 4: Simplify right side
   2,185.47x = 2,375,030.98
5. Step 5: Solve for x
   x = 2,375,030.98/2,185.47
6. Step 6: Final answer
   x = 1,086.74