Finding the Fourth Proportional to 49,105.20, 67,780.08 and 28,960.50

Step by Step Solution

1. Step 1: Write the proportion equation
   49,105.20 : 67,780.08 = 28,960.50 : x
2. Step 2: Convert to fraction form
   49,105.20/67,780.08 = 28,960.50/x
3. Step 3: Cross multiply
   49,105.20x = 67,780.08 × 28,960.50
4. Step 4: Simplify right side
   49,105.20x = 1,962,945,006.84
5. Step 5: Solve for x
   x = 1,962,945,006.84/49,105.20
6. Step 6: Final answer
   x = 39,974.28