Finding the Fourth Proportional to 139,290.72, 208,967.07 and 50,542.26

Step by Step Solution

1. Step 1: Write the proportion equation
   139,290.72 : 208,967.07 = 50,542.26 : x
2. Step 2: Convert to fraction form
   139,290.72/208,967.07 = 50,542.26/x
3. Step 3: Cross multiply
   139,290.72x = 208,967.07 × 50,542.26
4. Step 4: Simplify right side
   139,290.72x = 10,561,667,983.38
5. Step 5: Solve for x
   x = 10,561,667,983.38/139,290.72
6. Step 6: Final answer
   x = 75,824.63