Finding the Fourth Proportional to 278,105.42, 383,761.86 and 157,229.94

Step by Step Solution

1. Step 1: Write the proportion equation
   278,105.42 : 383,761.86 = 157,229.94 : x
2. Step 2: Convert to fraction form
   278,105.42/383,761.86 = 157,229.94/x
3. Step 3: Cross multiply
   278,105.42x = 383,761.86 × 157,229.94
4. Step 4: Simplify right side
   278,105.42x = 60,338,854,222.09
5. Step 5: Solve for x
   x = 60,338,854,222.09/278,105.42
6. Step 6: Final answer
   x = 216,963.96