Finding the Fourth Proportional to 78,653.38, 108,579 and 50,375.74

Step by Step Solution

1. Step 1: Write the proportion equation
   78,653.38 : 108,579 = 50,375.74 : x
2. Step 2: Convert to fraction form
   78,653.38/108,579 = 50,375.74/x
3. Step 3: Cross multiply
   78,653.38x = 108,579 × 50,375.74
4. Step 4: Simplify right side
   78,653.38x = 5,469,747,473.46
5. Step 5: Solve for x
   x = 5,469,747,473.46/78,653.38
6. Step 6: Final answer
   x = 69,542.43