Finding the Fourth Proportional to 138,819.42, 208,178.91 and 50,049.09

Step by Step Solution

1. Step 1: Write the proportion equation
   138,819.42 : 208,178.91 = 50,049.09 : x
2. Step 2: Convert to fraction form
   138,819.42/208,178.91 = 50,049.09/x
3. Step 3: Cross multiply
   138,819.42x = 208,178.91 × 50,049.09
4. Step 4: Simplify right side
   138,819.42x = 10,419,165,002.69
5. Step 5: Solve for x
   x = 10,419,165,002.69/138,819.42
6. Step 6: Final answer
   x = 75,055.53