Finding the Fourth Proportional to 1,103.94, 1,523.91 and 661.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.94 : 1,523.91 = 661.77 : x
2. Step 2: Convert to fraction form
   1,103.94/1,523.91 = 661.77/x
3. Step 3: Cross multiply
   1,103.94x = 1,523.91 × 661.77
4. Step 4: Simplify right side
   1,103.94x = 1,008,477.92
5. Step 5: Solve for x
   x = 1,008,477.92/1,103.94
6. Step 6: Final answer
   x = 913.53