Finding the Fourth Proportional to 139,064.74, 208,504.92 and 50,306.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139,064.74 : 208,504.92 = 50,306.56 : x
2. Step 2: Convert to fraction form
   139,064.74/208,504.92 = 50,306.56/x
3. Step 3: Cross multiply
   139,064.74x = 208,504.92 × 50,306.56
4. Step 4: Simplify right side
   139,064.74x = 10,489,165,268.28
5. Step 5: Solve for x
   x = 10,489,165,268.28/139,064.74
6. Step 6: Final answer
   x = 75,426.49