Finding the Fourth Proportional to 1,433.72, 1,978.66 and 874.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.72 : 1,978.66 = 874.22 : x
2. Step 2: Convert to fraction form
   1,433.72/1,978.66 = 874.22/x
3. Step 3: Cross multiply
   1,433.72x = 1,978.66 × 874.22
4. Step 4: Simplify right side
   1,433.72x = 1,729,772.07
5. Step 5: Solve for x
   x = 1,729,772.07/1,433.72
6. Step 6: Final answer
   x = 1,206.50