Finding the Fourth Proportional to 1,434.28, 1,979.34 and 804.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.28 : 1,979.34 = 804.87 : x
2. Step 2: Convert to fraction form
   1,434.28/1,979.34 = 804.87/x
3. Step 3: Cross multiply
   1,434.28x = 1,979.34 × 804.87
4. Step 4: Simplify right side
   1,434.28x = 1,593,111.39
5. Step 5: Solve for x
   x = 1,593,111.39/1,434.28
6. Step 6: Final answer
   x = 1,110.74