Finding the Fourth Proportional to 492,843.58, 680,108.88 and 277,980.55

Step by Step Solution

1. Step 1: Write the proportion equation
   492,843.58 : 680,108.88 = 277,980.55 : x
2. Step 2: Convert to fraction form
   492,843.58/680,108.88 = 277,980.55/x
3. Step 3: Cross multiply
   492,843.58x = 680,108.88 × 277,980.55
4. Step 4: Simplify right side
   492,843.58x = 189,057,040,522.28
5. Step 5: Solve for x
   x = 189,057,040,522.28/492,843.58
6. Step 6: Final answer
   x = 383,604.55