Finding the Fourth Proportional to 1,053.38, 1,453.88 and 660.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.38 : 1,453.88 = 660.12 : x
2. Step 2: Convert to fraction form
   1,053.38/1,453.88 = 660.12/x
3. Step 3: Cross multiply
   1,053.38x = 1,453.88 × 660.12
4. Step 4: Simplify right side
   1,053.38x = 959,735.27
5. Step 5: Solve for x
   x = 959,735.27/1,053.38
6. Step 6: Final answer
   x = 911.10