Finding the Fourth Proportional to 1,434.74, 1,979.91 and 805.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.74 : 1,979.91 = 805.25 : x
2. Step 2: Convert to fraction form
   1,434.74/1,979.91 = 805.25/x
3. Step 3: Cross multiply
   1,434.74x = 1,979.91 × 805.25
4. Step 4: Simplify right side
   1,434.74x = 1,594,327.48
5. Step 5: Solve for x
   x = 1,594,327.48/1,434.74
6. Step 6: Final answer
   x = 1,111.23