Finding the Fourth Proportional to 1,101.98, 1,520.46 and 660.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,101.98 : 1,520.46 = 660.03 : x
2. Step 2: Convert to fraction form
   1,101.98/1,520.46 = 660.03/x
3. Step 3: Cross multiply
   1,101.98x = 1,520.46 × 660.03
4. Step 4: Simplify right side
   1,101.98x = 1,003,549.21
5. Step 5: Solve for x
   x = 1,003,549.21/1,101.98
6. Step 6: Final answer
   x = 910.68