Finding the Fourth Proportional to 322,978.27, 445,709.49 and 200,425.06

Step by Step Solution

1. Step 1: Write the proportion equation
   322,978.27 : 445,709.49 = 200,425.06 : x
2. Step 2: Convert to fraction form
   322,978.27/445,709.49 = 200,425.06/x
3. Step 3: Cross multiply
   322,978.27x = 445,709.49 × 200,425.06
4. Step 4: Simplify right side
   322,978.27x = 89,331,351,275.82
5. Step 5: Solve for x
   x = 89,331,351,275.82/322,978.27
6. Step 6: Final answer
   x = 276,586.26