Finding the Fourth Proportional to 339,061.30, 508,757.19 and 139,441.54

Step by Step Solution

1. Step 1: Write the proportion equation
   339,061.30 : 508,757.19 = 139,441.54 : x
2. Step 2: Convert to fraction form
   339,061.30/508,757.19 = 139,441.54/x
3. Step 3: Cross multiply
   339,061.30x = 508,757.19 × 139,441.54
4. Step 4: Simplify right side
   339,061.30x = 70,941,886,059.67
5. Step 5: Solve for x
   x = 70,941,886,059.67/339,061.30
6. Step 6: Final answer
   x = 209,230.27