Finding the Fourth Proportional to 139,529.28, 209,311.92 and 50,769.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,529.28 : 209,311.92 = 50,769.12 : x
2. Step 2: Convert to fraction form
   139,529.28/209,311.92 = 50,769.12/x
3. Step 3: Cross multiply
   139,529.28x = 209,311.92 × 50,769.12
4. Step 4: Simplify right side
   139,529.28x = 10,626,581,983.91
5. Step 5: Solve for x
   x = 10,626,581,983.91/139,529.28
6. Step 6: Final answer
   x = 76,160.23