Finding the Fourth Proportional to 1,434.32, 1,979.56 and 874.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.32 : 1,979.56 = 874.80 : x
2. Step 2: Convert to fraction form
   1,434.32/1,979.56 = 874.80/x
3. Step 3: Cross multiply
   1,434.32x = 1,979.56 × 874.80
4. Step 4: Simplify right side
   1,434.32x = 1,731,719.09
5. Step 5: Solve for x
   x = 1,731,719.09/1,434.32
6. Step 6: Final answer
   x = 1,207.35