Finding the Fourth Proportional to 1,103.91, 1,523.32 and 661.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.91 : 1,523.32 = 661.83 : x
2. Step 2: Convert to fraction form
   1,103.91/1,523.32 = 661.83/x
3. Step 3: Cross multiply
   1,103.91x = 1,523.32 × 661.83
4. Step 4: Simplify right side
   1,103.91x = 1,008,178.88
5. Step 5: Solve for x
   x = 1,008,178.88/1,103.91
6. Step 6: Final answer
   x = 913.28