Finding the Fourth Proportional to 1,018.68, 1,404.54 and 723.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.68 : 1,404.54 = 723.72 : x
2. Step 2: Convert to fraction form
   1,018.68/1,404.54 = 723.72/x
3. Step 3: Cross multiply
   1,018.68x = 1,404.54 × 723.72
4. Step 4: Simplify right side
   1,018.68x = 1,016,493.69
5. Step 5: Solve for x
   x = 1,016,493.69/1,018.68
6. Step 6: Final answer
   x = 997.85