Finding the Fourth Proportional to 1,166.79, 1,610.17 and 724.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,166.79 : 1,610.17 = 724.42 : x
2. Step 2: Convert to fraction form
   1,166.79/1,610.17 = 724.42/x
3. Step 3: Cross multiply
   1,166.79x = 1,610.17 × 724.42
4. Step 4: Simplify right side
   1,166.79x = 1,166,439.35
5. Step 5: Solve for x
   x = 1,166,439.35/1,166.79
6. Step 6: Final answer
   x = 999.70