Finding the Fourth Proportional to 1,433.18, 1,978.04 and 843.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.18 : 1,978.04 = 843.74 : x
2. Step 2: Convert to fraction form
   1,433.18/1,978.04 = 843.74/x
3. Step 3: Cross multiply
   1,433.18x = 1,978.04 × 843.74
4. Step 4: Simplify right side
   1,433.18x = 1,668,951.47
5. Step 5: Solve for x
   x = 1,668,951.47/1,433.18
6. Step 6: Final answer
   x = 1,164.51