Finding the Fourth Proportional to 1,432.72, 1,977.48 and 843.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,432.72 : 1,977.48 = 843.28 : x
2. Step 2: Convert to fraction form
   1,432.72/1,977.48 = 843.28/x
3. Step 3: Cross multiply
   1,432.72x = 1,977.48 × 843.28
4. Step 4: Simplify right side
   1,432.72x = 1,667,569.33
5. Step 5: Solve for x
   x = 1,667,569.33/1,432.72
6. Step 6: Final answer
   x = 1,163.92