Finding the Fourth Proportional to 139,704.05, 209,587.34 and 50,957.57

Step by Step Solution

1. Step 1: Write the proportion equation
   139,704.05 : 209,587.34 = 50,957.57 : x
2. Step 2: Convert to fraction form
   139,704.05/209,587.34 = 50,957.57/x
3. Step 3: Cross multiply
   139,704.05x = 209,587.34 × 50,957.57
4. Step 4: Simplify right side
   139,704.05x = 10,680,060,246.44
5. Step 5: Solve for x
   x = 10,680,060,246.44/139,704.05
6. Step 6: Final answer
   x = 76,447.75