Finding the Fourth Proportional to 275,022.17, 379,554.32 and 154,186.78

Step by Step Solution

1. Step 1: Write the proportion equation
   275,022.17 : 379,554.32 = 154,186.78 : x
2. Step 2: Convert to fraction form
   275,022.17/379,554.32 = 154,186.78/x
3. Step 3: Cross multiply
   275,022.17x = 379,554.32 × 154,186.78
4. Step 4: Simplify right side
   275,022.17x = 58,522,258,435.89
5. Step 5: Solve for x
   x = 58,522,258,435.89/275,022.17
6. Step 6: Final answer
   x = 212,791.06