Finding the Fourth Proportional to 281,680.34, 388,728.34 and 154,354.82

Step by Step Solution

1. Step 1: Write the proportion equation
   281,680.34 : 388,728.34 = 154,354.82 : x
2. Step 2: Convert to fraction form
   281,680.34/388,728.34 = 154,354.82/x
3. Step 3: Cross multiply
   281,680.34x = 388,728.34 × 154,354.82
4. Step 4: Simplify right side
   281,680.34x = 60,002,092,949.60
5. Step 5: Solve for x
   x = 60,002,092,949.60/281,680.34
6. Step 6: Final answer
   x = 213,014.84