Finding the Fourth Proportional to 281,868.42, 388,977.89 and 154,543.71

Step by Step Solution

1. Step 1: Write the proportion equation
   281,868.42 : 388,977.89 = 154,543.71 : x
2. Step 2: Convert to fraction form
   281,868.42/388,977.89 = 154,543.71/x
3. Step 3: Cross multiply
   281,868.42x = 388,977.89 × 154,543.71
4. Step 4: Simplify right side
   281,868.42x = 60,114,085,455.85
5. Step 5: Solve for x
   x = 60,114,085,455.85/281,868.42
6. Step 6: Final answer
   x = 213,270.03