Finding the Fourth Proportional to 275,488.38, 380,144.76 and 154,642.98

Step by Step Solution

1. Step 1: Write the proportion equation
   275,488.38 : 380,144.76 = 154,642.98 : x
2. Step 2: Convert to fraction form
   275,488.38/380,144.76 = 154,642.98/x
3. Step 3: Cross multiply
   275,488.38x = 380,144.76 × 154,642.98
4. Step 4: Simplify right side
   275,488.38x = 58,786,718,517.78
5. Step 5: Solve for x
   x = 58,786,718,517.78/275,488.38
6. Step 6: Final answer
   x = 213,390.92