Finding the Fourth Proportional to 1,053.72, 1,453.78 and 611.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.72 : 1,453.78 = 611.46 : x
2. Step 2: Convert to fraction form
   1,053.72/1,453.78 = 611.46/x
3. Step 3: Cross multiply
   1,053.72x = 1,453.78 × 611.46
4. Step 4: Simplify right side
   1,053.72x = 888,928.32
5. Step 5: Solve for x
   x = 888,928.32/1,053.72
6. Step 6: Final answer
   x = 843.61