Finding the Fourth Proportional to 1,132.89, 1,696.52 and 720.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,132.89 : 1,696.52 = 720.81 : x
2. Step 2: Convert to fraction form
   1,132.89/1,696.52 = 720.81/x
3. Step 3: Cross multiply
   1,132.89x = 1,696.52 × 720.81
4. Step 4: Simplify right side
   1,132.89x = 1,222,864.98
5. Step 5: Solve for x
   x = 1,222,864.98/1,132.89
6. Step 6: Final answer
   x = 1,079.42