Finding the Fourth Proportional to 281,839.38, 388,938.15 and 154,517.10

Step by Step Solution

1. Step 1: Write the proportion equation
   281,839.38 : 388,938.15 = 154,517.10 : x
2. Step 2: Convert to fraction form
   281,839.38/388,938.15 = 154,517.10/x
3. Step 3: Cross multiply
   281,839.38x = 388,938.15 × 154,517.10
4. Step 4: Simplify right side
   281,839.38x = 60,097,595,017.37
5. Step 5: Solve for x
   x = 60,097,595,017.37/281,839.38
6. Step 6: Final answer
   x = 213,233.49