Finding the Fourth Proportional to 1,382.58, 2,072.46 and 724.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.58 : 2,072.46 = 724.68 : x
2. Step 2: Convert to fraction form
   1,382.58/2,072.46 = 724.68/x
3. Step 3: Cross multiply
   1,382.58x = 2,072.46 × 724.68
4. Step 4: Simplify right side
   1,382.58x = 1,501,870.31
5. Step 5: Solve for x
   x = 1,501,870.31/1,382.58
6. Step 6: Final answer
   x = 1,086.28