Finding the Fourth Proportional to 1,161.06, 1,602.56 and 718.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,161.06 : 1,602.56 = 718.71 : x
2. Step 2: Convert to fraction form
   1,161.06/1,602.56 = 718.71/x
3. Step 3: Cross multiply
   1,161.06x = 1,602.56 × 718.71
4. Step 4: Simplify right side
   1,161.06x = 1,151,775.90
5. Step 5: Solve for x
   x = 1,151,775.90/1,161.06
6. Step 6: Final answer
   x = 992.00