Finding the Fourth Proportional to 1,053.27, 1,453.65 and 611.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.27 : 1,453.65 = 611.31 : x
2. Step 2: Convert to fraction form
   1,053.27/1,453.65 = 611.31/x
3. Step 3: Cross multiply
   1,053.27x = 1,453.65 × 611.31
4. Step 4: Simplify right side
   1,053.27x = 888,630.78
5. Step 5: Solve for x
   x = 888,630.78/1,053.27
6. Step 6: Final answer
   x = 843.69