Finding the Fourth Proportional to 49,108.78, 67,759.64 and 28,958.31

Step by Step Solution

1. Step 1: Write the proportion equation
   49,108.78 : 67,759.64 = 28,958.31 : x
2. Step 2: Convert to fraction form
   49,108.78/67,759.64 = 28,958.31/x
3. Step 3: Cross multiply
   49,108.78x = 67,759.64 × 28,958.31
4. Step 4: Simplify right side
   49,108.78x = 1,962,204,624.41
5. Step 5: Solve for x
   x = 1,962,204,624.41/49,108.78
6. Step 6: Final answer
   x = 39,956.29