Finding the Fourth Proportional to 49,079.16, 67,728.42 and 28,936.80

Step by Step Solution

1. Step 1: Write the proportion equation
   49,079.16 : 67,728.42 = 28,936.80 : x
2. Step 2: Convert to fraction form
   49,079.16/67,728.42 = 28,936.80/x
3. Step 3: Cross multiply
   49,079.16x = 67,728.42 × 28,936.80
4. Step 4: Simplify right side
   49,079.16x = 1,959,843,743.86
5. Step 5: Solve for x
   x = 1,959,843,743.86/49,079.16
6. Step 6: Final answer
   x = 39,932.30