Finding the Fourth Proportional to 139,706.05, 209,590.34 and 50,959.57

Step by Step Solution

1. Step 1: Write the proportion equation
   139,706.05 : 209,590.34 = 50,959.57 : x
2. Step 2: Convert to fraction form
   139,706.05/209,590.34 = 50,959.57/x
3. Step 3: Cross multiply
   139,706.05x = 209,590.34 × 50,959.57
4. Step 4: Simplify right side
   139,706.05x = 10,680,633,602.55
5. Step 5: Solve for x
   x = 10,680,633,602.55/139,706.05
6. Step 6: Final answer
   x = 76,450.76