Finding the Fourth Proportional to 1,018.72, 1,403.83 and 723.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.72 : 1,403.83 = 723.48 : x
2. Step 2: Convert to fraction form
   1,018.72/1,403.83 = 723.48/x
3. Step 3: Cross multiply
   1,018.72x = 1,403.83 × 723.48
4. Step 4: Simplify right side
   1,018.72x = 1,015,642.93
5. Step 5: Solve for x
   x = 1,015,642.93/1,018.72
6. Step 6: Final answer
   x = 996.98