Finding the Fourth Proportional to 1,103.57, 1,522.80 and 661.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.57 : 1,522.80 = 661.46 : x
2. Step 2: Convert to fraction form
   1,103.57/1,522.80 = 661.46/x
3. Step 3: Cross multiply
   1,103.57x = 1,522.80 × 661.46
4. Step 4: Simplify right side
   1,103.57x = 1,007,263.67
5. Step 5: Solve for x
   x = 1,007,263.67/1,103.57
6. Step 6: Final answer
   x = 912.74