Finding the Fourth Proportional to 1,103.62, 1,523.04 and 661.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.62 : 1,523.04 = 661.43 : x
2. Step 2: Convert to fraction form
   1,103.62/1,523.04 = 661.43/x
3. Step 3: Cross multiply
   1,103.62x = 1,523.04 × 661.43
4. Step 4: Simplify right side
   1,103.62x = 1,007,381.04
5. Step 5: Solve for x
   x = 1,007,381.04/1,103.62
6. Step 6: Final answer
   x = 912.80