Finding the Fourth Proportional to 139,730.63, 209,626.86 and 50,983.88

Step by Step Solution

1. Step 1: Write the proportion equation
   139,730.63 : 209,626.86 = 50,983.88 : x
2. Step 2: Convert to fraction form
   139,730.63/209,626.86 = 50,983.88/x
3. Step 3: Cross multiply
   139,730.63x = 209,626.86 × 50,983.88
4. Step 4: Simplify right side
   139,730.63x = 10,687,589,626.88
5. Step 5: Solve for x
   x = 10,687,589,626.88/139,730.63
6. Step 6: Final answer
   x = 76,487.10