Finding the Fourth Proportional to 1,103.86, 1,523.27 and 661.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.86 : 1,523.27 = 661.54 : x
2. Step 2: Convert to fraction form
   1,103.86/1,523.27 = 661.54/x
3. Step 3: Cross multiply
   1,103.86x = 1,523.27 × 661.54
4. Step 4: Simplify right side
   1,103.86x = 1,007,700.73
5. Step 5: Solve for x
   x = 1,007,700.73/1,103.86
6. Step 6: Final answer
   x = 912.89