Finding the Fourth Proportional to 139,639.10, 209,333.03 and 50,830.29

Step by Step Solution

1. Step 1: Write the proportion equation
   139,639.10 : 209,333.03 = 50,830.29 : x
2. Step 2: Convert to fraction form
   139,639.10/209,333.03 = 50,830.29/x
3. Step 3: Cross multiply
   139,639.10x = 209,333.03 × 50,830.29
4. Step 4: Simplify right side
   139,639.10x = 10,640,458,367.33
5. Step 5: Solve for x
   x = 10,640,458,367.33/139,639.10
6. Step 6: Final answer
   x = 76,199.71