Finding the Fourth Proportional to 1,165.06, 1,606.88 and 722.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,165.06 : 1,606.88 = 722.72 : x
2. Step 2: Convert to fraction form
   1,165.06/1,606.88 = 722.72/x
3. Step 3: Cross multiply
   1,165.06x = 1,606.88 × 722.72
4. Step 4: Simplify right side
   1,165.06x = 1,161,324.31
5. Step 5: Solve for x
   x = 1,161,324.31/1,165.06
6. Step 6: Final answer
   x = 996.79