Finding the Fourth Proportional to 1,434.12, 1,978.94 and 874.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.12 : 1,978.94 = 874.32 : x
2. Step 2: Convert to fraction form
   1,434.12/1,978.94 = 874.32/x
3. Step 3: Cross multiply
   1,434.12x = 1,978.94 × 874.32
4. Step 4: Simplify right side
   1,434.12x = 1,730,226.82
5. Step 5: Solve for x
   x = 1,730,226.82/1,434.12
6. Step 6: Final answer
   x = 1,206.47