Finding the Fourth Proportional to 1,432.83, 1,976.51 and 843.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,432.83 : 1,976.51 = 843.21 : x
2. Step 2: Convert to fraction form
   1,432.83/1,976.51 = 843.21/x
3. Step 3: Cross multiply
   1,432.83x = 1,976.51 × 843.21
4. Step 4: Simplify right side
   1,432.83x = 1,666,608.78
5. Step 5: Solve for x
   x = 1,666,608.78/1,432.83
6. Step 6: Final answer
   x = 1,163.16