Finding the Fourth Proportional to 49,639.92, 68,501.34 and 28,404.15

Step by Step Solution

1. Step 1: Write the proportion equation
   49,639.92 : 68,501.34 = 28,404.15 : x
2. Step 2: Convert to fraction form
   49,639.92/68,501.34 = 28,404.15/x
3. Step 3: Cross multiply
   49,639.92x = 68,501.34 × 28,404.15
4. Step 4: Simplify right side
   49,639.92x = 1,945,722,336.56
5. Step 5: Solve for x
   x = 1,945,722,336.56/49,639.92
6. Step 6: Final answer
   x = 39,196.73