Finding the Fourth Proportional to 479,744.50, 662,105.73 and 278,540.50

Step by Step Solution

1. Step 1: Write the proportion equation
   479,744.50 : 662,105.73 = 278,540.50 : x
2. Step 2: Convert to fraction form
   479,744.50/662,105.73 = 278,540.50/x
3. Step 3: Cross multiply
   479,744.50x = 662,105.73 × 278,540.50
4. Step 4: Simplify right side
   479,744.50x = 184,423,261,087.07
5. Step 5: Solve for x
   x = 184,423,261,087.07/479,744.50
6. Step 6: Final answer
   x = 384,419.75