Finding the Fourth Proportional to 1,103.22, 1,522.89 and 661.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.22 : 1,522.89 = 661.23 : x
2. Step 2: Convert to fraction form
   1,103.22/1,522.89 = 661.23/x
3. Step 3: Cross multiply
   1,103.22x = 1,522.89 × 661.23
4. Step 4: Simplify right side
   1,103.22x = 1,006,980.55
5. Step 5: Solve for x
   x = 1,006,980.55/1,103.22
6. Step 6: Final answer
   x = 912.76