Finding the Fourth Proportional to 1,433.72, 1,978.58 and 874.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.72 : 1,978.58 = 874.06 : x
2. Step 2: Convert to fraction form
   1,433.72/1,978.58 = 874.06/x
3. Step 3: Cross multiply
   1,433.72x = 1,978.58 × 874.06
4. Step 4: Simplify right side
   1,433.72x = 1,729,401.09
5. Step 5: Solve for x
   x = 1,729,401.09/1,433.72
6. Step 6: Final answer
   x = 1,206.23