Finding the Fourth Proportional to 49,628.78, 68,490.78 and 28,407.56

Step by Step Solution

1. Step 1: Write the proportion equation
   49,628.78 : 68,490.78 = 28,407.56 : x
2. Step 2: Convert to fraction form
   49,628.78/68,490.78 = 28,407.56/x
3. Step 3: Cross multiply
   49,628.78x = 68,490.78 × 28,407.56
4. Step 4: Simplify right side
   49,628.78x = 1,945,655,942.30
5. Step 5: Solve for x
   x = 1,945,655,942.30/49,628.78
6. Step 6: Final answer
   x = 39,204.19