Finding the Fourth Proportional to 1,103.25, 1,522.43 and 661.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.25 : 1,522.43 = 661.07 : x
2. Step 2: Convert to fraction form
   1,103.25/1,522.43 = 661.07/x
3. Step 3: Cross multiply
   1,103.25x = 1,522.43 × 661.07
4. Step 4: Simplify right side
   1,103.25x = 1,006,421.88
5. Step 5: Solve for x
   x = 1,006,421.88/1,103.25
6. Step 6: Final answer
   x = 912.23