Finding the Fourth Proportional to 1,072.42, 1,480.53 and 723.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.42 : 1,480.53 = 723.58 : x
2. Step 2: Convert to fraction form
   1,072.42/1,480.53 = 723.58/x
3. Step 3: Cross multiply
   1,072.42x = 1,480.53 × 723.58
4. Step 4: Simplify right side
   1,072.42x = 1,071,281.90
5. Step 5: Solve for x
   x = 1,071,281.90/1,072.42
6. Step 6: Final answer
   x = 998.94