Finding the Fourth Proportional to 281,754.78, 388,820.79 and 154,429.98

Step by Step Solution

1. Step 1: Write the proportion equation
   281,754.78 : 388,820.79 = 154,429.98 : x
2. Step 2: Convert to fraction form
   281,754.78/388,820.79 = 154,429.98/x
3. Step 3: Cross multiply
   281,754.78x = 388,820.79 × 154,429.98
4. Step 4: Simplify right side
   281,754.78x = 60,045,586,823.28
5. Step 5: Solve for x
   x = 60,045,586,823.28/281,754.78
6. Step 6: Final answer
   x = 213,112.93