Finding the Fourth Proportional to 139,336.09, 209,003.02 and 82,801.80

Step by Step Solution

1. Step 1: Write the proportion equation
   139,336.09 : 209,003.02 = 82,801.80 : x
2. Step 2: Convert to fraction form
   139,336.09/209,003.02 = 82,801.80/x
3. Step 3: Cross multiply
   139,336.09x = 209,003.02 × 82,801.80
4. Step 4: Simplify right side
   139,336.09x = 17,305,826,261.44
5. Step 5: Solve for x
   x = 17,305,826,261.44/139,336.09
6. Step 6: Final answer
   x = 124,202.04