Finding the Fourth Proportional to 1,103.97, 1,523.67 and 661.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.97 : 1,523.67 = 661.89 : x
2. Step 2: Convert to fraction form
   1,103.97/1,523.67 = 661.89/x
3. Step 3: Cross multiply
   1,103.97x = 1,523.67 × 661.89
4. Step 4: Simplify right side
   1,103.97x = 1,008,501.94
5. Step 5: Solve for x
   x = 1,008,501.94/1,103.97
6. Step 6: Final answer
   x = 913.52