Finding the Fourth Proportional to 1,072.71, 1,479.47 and 723.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.71 : 1,479.47 = 723.33 : x
2. Step 2: Convert to fraction form
   1,072.71/1,479.47 = 723.33/x
3. Step 3: Cross multiply
   1,072.71x = 1,479.47 × 723.33
4. Step 4: Simplify right side
   1,072.71x = 1,070,141.42
5. Step 5: Solve for x
   x = 1,070,141.42/1,072.71
6. Step 6: Final answer
   x = 997.61