Finding the Fourth Proportional to 139,729.20, 209,597.25 and 50,982.69

Step by Step Solution

1. Step 1: Write the proportion equation
   139,729.20 : 209,597.25 = 50,982.69 : x
2. Step 2: Convert to fraction form
   139,729.20/209,597.25 = 50,982.69/x
3. Step 3: Cross multiply
   139,729.20x = 209,597.25 × 50,982.69
4. Step 4: Simplify right side
   139,729.20x = 10,685,831,579.12
5. Step 5: Solve for x
   x = 10,685,831,579.12/139,729.20
6. Step 6: Final answer
   x = 76,475.29