Finding the Fourth Proportional to 1,103.56, 1,523.10 and 661.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.56 : 1,523.10 = 661.48 : x
2. Step 2: Convert to fraction form
   1,103.56/1,523.10 = 661.48/x
3. Step 3: Cross multiply
   1,103.56x = 1,523.10 × 661.48
4. Step 4: Simplify right side
   1,103.56x = 1,007,500.19
5. Step 5: Solve for x
   x = 1,007,500.19/1,103.56
6. Step 6: Final answer
   x = 912.95