Finding the Fourth Proportional to 1,072.57, 1,479.58 and 723.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.57 : 1,479.58 = 723.37 : x
2. Step 2: Convert to fraction form
   1,072.57/1,479.58 = 723.37/x
3. Step 3: Cross multiply
   1,072.57x = 1,479.58 × 723.37
4. Step 4: Simplify right side
   1,072.57x = 1,070,283.78
5. Step 5: Solve for x
   x = 1,070,283.78/1,072.57
6. Step 6: Final answer
   x = 997.87