Finding the Fourth Proportional to 1,165.98, 1,608.58 and 723.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,165.98 : 1,608.58 = 723.72 : x
2. Step 2: Convert to fraction form
   1,165.98/1,608.58 = 723.72/x
3. Step 3: Cross multiply
   1,165.98x = 1,608.58 × 723.72
4. Step 4: Simplify right side
   1,165.98x = 1,164,161.52
5. Step 5: Solve for x
   x = 1,164,161.52/1,165.98
6. Step 6: Final answer
   x = 998.44