Finding the Fourth Proportional to 1,434.15, 1,979.31 and 844.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.15 : 1,979.31 = 844.74 : x
2. Step 2: Convert to fraction form
   1,434.15/1,979.31 = 844.74/x
3. Step 3: Cross multiply
   1,434.15x = 1,979.31 × 844.74
4. Step 4: Simplify right side
   1,434.15x = 1,672,002.33
5. Step 5: Solve for x
   x = 1,672,002.33/1,434.15
6. Step 6: Final answer
   x = 1,165.85