Finding the Fourth Proportional to 139,705.43, 209,589.40 and 50,958.94

Step by Step Solution

1. Step 1: Write the proportion equation
   139,705.43 : 209,589.40 = 50,958.94 : x
2. Step 2: Convert to fraction form
   139,705.43/209,589.40 = 50,958.94/x
3. Step 3: Cross multiply
   139,705.43x = 209,589.40 × 50,958.94
4. Step 4: Simplify right side
   139,705.43x = 10,680,453,698.28
5. Step 5: Solve for x
   x = 10,680,453,698.28/139,705.43
6. Step 6: Final answer
   x = 76,449.81