Finding the Fourth Proportional to 1,103.88, 1,522.82 and 661.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.88 : 1,522.82 = 661.69 : x
2. Step 2: Convert to fraction form
   1,103.88/1,522.82 = 661.69/x
3. Step 3: Cross multiply
   1,103.88x = 1,522.82 × 661.69
4. Step 4: Simplify right side
   1,103.88x = 1,007,634.77
5. Step 5: Solve for x
   x = 1,007,634.77/1,103.88
6. Step 6: Final answer
   x = 912.81