Finding the Fourth Proportional to 278,938.88, 384,920.89 and 158,081.61

Step by Step Solution

1. Step 1: Write the proportion equation
   278,938.88 : 384,920.89 = 158,081.61 : x
2. Step 2: Convert to fraction form
   278,938.88/384,920.89 = 158,081.61/x
3. Step 3: Cross multiply
   278,938.88x = 384,920.89 × 158,081.61
4. Step 4: Simplify right side
   278,938.88x = 60,848,915,951.29
5. Step 5: Solve for x
   x = 60,848,915,951.29/278,938.88
6. Step 6: Final answer
   x = 218,144.26