Finding the Fourth Proportional to 49,638.78, 68,504.58 and 28,417.56

Step by Step Solution

1. Step 1: Write the proportion equation
   49,638.78 : 68,504.58 = 28,417.56 : x
2. Step 2: Convert to fraction form
   49,638.78/68,504.58 = 28,417.56/x
3. Step 3: Cross multiply
   49,638.78x = 68,504.58 × 28,417.56
4. Step 4: Simplify right side
   49,638.78x = 1,946,733,012.42
5. Step 5: Solve for x
   x = 1,946,733,012.42/49,638.78
6. Step 6: Final answer
   x = 39,217.99