Finding the Fourth Proportional to 1,053.64, 1,453.89 and 611.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.64 : 1,453.89 = 611.48 : x
2. Step 2: Convert to fraction form
   1,053.64/1,453.89 = 611.48/x
3. Step 3: Cross multiply
   1,053.64x = 1,453.89 × 611.48
4. Step 4: Simplify right side
   1,053.64x = 889,030.58
5. Step 5: Solve for x
   x = 889,030.58/1,053.64
6. Step 6: Final answer
   x = 843.77