Finding the Fourth Proportional to 1,143.71, 1,578.04 and 723.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,143.71 : 1,578.04 = 723.32 : x
2. Step 2: Convert to fraction form
   1,143.71/1,578.04 = 723.32/x
3. Step 3: Cross multiply
   1,143.71x = 1,578.04 × 723.32
4. Step 4: Simplify right side
   1,143.71x = 1,141,427.89
5. Step 5: Solve for x
   x = 1,141,427.89/1,143.71
6. Step 6: Final answer
   x = 998.00