Finding the Fourth Proportional to 1,103.67, 1,522.95 and 661.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.67 : 1,522.95 = 661.56 : x
2. Step 2: Convert to fraction form
   1,103.67/1,522.95 = 661.56/x
3. Step 3: Cross multiply
   1,103.67x = 1,522.95 × 661.56
4. Step 4: Simplify right side
   1,103.67x = 1,007,522.80
5. Step 5: Solve for x
   x = 1,007,522.80/1,103.67
6. Step 6: Final answer
   x = 912.88