Finding the Fourth Proportional to 1,103.42, 1,522.35 and 660.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.42 : 1,522.35 = 660.56 : x
2. Step 2: Convert to fraction form
   1,103.42/1,522.35 = 660.56/x
3. Step 3: Cross multiply
   1,103.42x = 1,522.35 × 660.56
4. Step 4: Simplify right side
   1,103.42x = 1,005,595.90
5. Step 5: Solve for x
   x = 1,005,595.90/1,103.42
6. Step 6: Final answer
   x = 911.34