Finding the Fourth Proportional to 1,433.76, 1,978.02 and 843.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.76 : 1,978.02 = 843.36 : x
2. Step 2: Convert to fraction form
   1,433.76/1,978.02 = 843.36/x
3. Step 3: Cross multiply
   1,433.76x = 1,978.02 × 843.36
4. Step 4: Simplify right side
   1,433.76x = 1,668,182.95
5. Step 5: Solve for x
   x = 1,668,182.95/1,433.76
6. Step 6: Final answer
   x = 1,163.50