Finding the Fourth Proportional to 139,730.13, 209,626.12 and 50,983.38

Step by Step Solution

1. Step 1: Write the proportion equation
   139,730.13 : 209,626.12 = 50,983.38 : x
2. Step 2: Convert to fraction form
   139,730.13/209,626.12 = 50,983.38/x
3. Step 3: Cross multiply
   139,730.13x = 209,626.12 × 50,983.38
4. Step 4: Simplify right side
   139,730.13x = 10,687,448,133.89
5. Step 5: Solve for x
   x = 10,687,448,133.89/139,730.13
6. Step 6: Final answer
   x = 76,486.35