Finding the Fourth Proportional to 284,253.38, 426,647.98 and 209,144.52

Step by Step Solution

1. Step 1: Write the proportion equation
   284,253.38 : 426,647.98 = 209,144.52 : x
2. Step 2: Convert to fraction form
   284,253.38/426,647.98 = 209,144.52/x
3. Step 3: Cross multiply
   284,253.38x = 426,647.98 × 209,144.52
4. Step 4: Simplify right side
   284,253.38x = 89,231,086,986.07
5. Step 5: Solve for x
   x = 89,231,086,986.07/284,253.38
6. Step 6: Final answer
   x = 313,913.90