Finding the Fourth Proportional to 1,434.63, 1,979.81 and 805.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.63 : 1,979.81 = 805.29 : x
2. Step 2: Convert to fraction form
   1,434.63/1,979.81 = 805.29/x
3. Step 3: Cross multiply
   1,434.63x = 1,979.81 × 805.29
4. Step 4: Simplify right side
   1,434.63x = 1,594,317.17
5. Step 5: Solve for x
   x = 1,594,317.17/1,434.63
6. Step 6: Final answer
   x = 1,111.31