Finding the Fourth Proportional to 1,053.30, 1,453.98 and 660.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.30 : 1,453.98 = 660.42 : x
2. Step 2: Convert to fraction form
   1,053.30/1,453.98 = 660.42/x
3. Step 3: Cross multiply
   1,053.30x = 1,453.98 × 660.42
4. Step 4: Simplify right side
   1,053.30x = 960,237.47
5. Step 5: Solve for x
   x = 960,237.47/1,053.30
6. Step 6: Final answer
   x = 911.65