Finding the Fourth Proportional to 274,667.54, 379,079.61 and 198,433.28

Step by Step Solution

1. Step 1: Write the proportion equation
   274,667.54 : 379,079.61 = 198,433.28 : x
2. Step 2: Convert to fraction form
   274,667.54/379,079.61 = 198,433.28/x
3. Step 3: Cross multiply
   274,667.54x = 379,079.61 × 198,433.28
4. Step 4: Simplify right side
   274,667.54x = 75,222,010,393.42
5. Step 5: Solve for x
   x = 75,222,010,393.42/274,667.54
6. Step 6: Final answer
   x = 273,865.67