Finding the Fourth Proportional to 139,171.43, 208,867.82 and 50,450.31

Step by Step Solution

1. Step 1: Write the proportion equation
   139,171.43 : 208,867.82 = 50,450.31 : x
2. Step 2: Convert to fraction form
   139,171.43/208,867.82 = 50,450.31/x
3. Step 3: Cross multiply
   139,171.43x = 208,867.82 × 50,450.31
4. Step 4: Simplify right side
   139,171.43x = 10,537,446,015.77
5. Step 5: Solve for x
   x = 10,537,446,015.77/139,171.43
6. Step 6: Final answer
   x = 75,715.58