Finding the Fourth Proportional to 1,434.46, 1,979.77 and 845.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.46 : 1,979.77 = 845.05 : x
2. Step 2: Convert to fraction form
   1,434.46/1,979.77 = 845.05/x
3. Step 3: Cross multiply
   1,434.46x = 1,979.77 × 845.05
4. Step 4: Simplify right side
   1,434.46x = 1,673,004.64
5. Step 5: Solve for x
   x = 1,673,004.64/1,434.46
6. Step 6: Final answer
   x = 1,166.30