Finding the Fourth Proportional to 492,697.46, 679,919.72 and 277,839.30

Step by Step Solution

1. Step 1: Write the proportion equation
   492,697.46 : 679,919.72 = 277,839.30 : x
2. Step 2: Convert to fraction form
   492,697.46/679,919.72 = 277,839.30/x
3. Step 3: Cross multiply
   492,697.46x = 679,919.72 × 277,839.30
4. Step 4: Simplify right side
   492,697.46x = 188,908,419,061.00
5. Step 5: Solve for x
   x = 188,908,419,061.00/492,697.46
6. Step 6: Final answer
   x = 383,416.67