Finding the Fourth Proportional to 139,575.49, 209,236.53 and 50,766.21

Step by Step Solution

1. Step 1: Write the proportion equation
   139,575.49 : 209,236.53 = 50,766.21 : x
2. Step 2: Convert to fraction form
   139,575.49/209,236.53 = 50,766.21/x
3. Step 3: Cross multiply
   139,575.49x = 209,236.53 × 50,766.21
4. Step 4: Simplify right side
   139,575.49x = 10,622,145,812.02
5. Step 5: Solve for x
   x = 10,622,145,812.02/139,575.49
6. Step 6: Final answer
   x = 76,103.23