Finding the Fourth Proportional to 139,772.28, 209,471.58 and 50,942.28

Step by Step Solution

1. Step 1: Write the proportion equation
   139,772.28 : 209,471.58 = 50,942.28 : x
2. Step 2: Convert to fraction form
   139,772.28/209,471.58 = 50,942.28/x
3. Step 3: Cross multiply
   139,772.28x = 209,471.58 × 50,942.28
4. Step 4: Simplify right side
   139,772.28x = 10,670,959,880.40
5. Step 5: Solve for x
   x = 10,670,959,880.40/139,772.28
6. Step 6: Final answer
   x = 76,345.32