Finding the Fourth Proportional to 1,162.02, 1,603.22 and 664.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.02 : 1,603.22 = 664.59 : x
2. Step 2: Convert to fraction form
   1,162.02/1,603.22 = 664.59/x
3. Step 3: Cross multiply
   1,162.02x = 1,603.22 × 664.59
4. Step 4: Simplify right side
   1,162.02x = 1,065,483.98
5. Step 5: Solve for x
   x = 1,065,483.98/1,162.02
6. Step 6: Final answer
   x = 916.92