Finding the Fourth Proportional to 139,289.72, 208,965.57 and 50,541.26

Step by Step Solution

1. Step 1: Write the proportion equation
   139,289.72 : 208,965.57 = 50,541.26 : x
2. Step 2: Convert to fraction form
   139,289.72/208,965.57 = 50,541.26/x
3. Step 3: Cross multiply
   139,289.72x = 208,965.57 × 50,541.26
4. Step 4: Simplify right side
   139,289.72x = 10,561,383,204.42
5. Step 5: Solve for x
   x = 10,561,383,204.42/139,289.72
6. Step 6: Final answer
   x = 75,823.13