Finding the Fourth Proportional to 1,103.06, 1,522.42 and 660.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.06 : 1,522.42 = 660.98 : x
2. Step 2: Convert to fraction form
   1,103.06/1,522.42 = 660.98/x
3. Step 3: Cross multiply
   1,103.06x = 1,522.42 × 660.98
4. Step 4: Simplify right side
   1,103.06x = 1,006,289.17
5. Step 5: Solve for x
   x = 1,006,289.17/1,103.06
6. Step 6: Final answer
   x = 912.27