Finding the Fourth Proportional to 1,053.34, 1,454.09 and 611.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.34 : 1,454.09 = 611.15 : x
2. Step 2: Convert to fraction form
   1,053.34/1,454.09 = 611.15/x
3. Step 3: Cross multiply
   1,053.34x = 1,454.09 × 611.15
4. Step 4: Simplify right side
   1,053.34x = 888,667.10
5. Step 5: Solve for x
   x = 888,667.10/1,053.34
6. Step 6: Final answer
   x = 843.67