Finding the Fourth Proportional to 1,433.12, 1,977.78 and 843.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.12 : 1,977.78 = 843.69 : x
2. Step 2: Convert to fraction form
   1,433.12/1,977.78 = 843.69/x
3. Step 3: Cross multiply
   1,433.12x = 1,977.78 × 843.69
4. Step 4: Simplify right side
   1,433.12x = 1,668,643.79
5. Step 5: Solve for x
   x = 1,668,643.79/1,433.12
6. Step 6: Final answer
   x = 1,164.35