Finding the Fourth Proportional to 1,162.22, 1,603.89 and 720.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.22 : 1,603.89 = 720.68 : x
2. Step 2: Convert to fraction form
   1,162.22/1,603.89 = 720.68/x
3. Step 3: Cross multiply
   1,162.22x = 1,603.89 × 720.68
4. Step 4: Simplify right side
   1,162.22x = 1,155,883.43
5. Step 5: Solve for x
   x = 1,155,883.43/1,162.22
6. Step 6: Final answer
   x = 994.55