Finding the Fourth Proportional to 139,971.38, 209,914.01 and 40,104.82

Step by Step Solution

1. Step 1: Write the proportion equation
   139,971.38 : 209,914.01 = 40,104.82 : x
2. Step 2: Convert to fraction form
   139,971.38/209,914.01 = 40,104.82/x
3. Step 3: Cross multiply
   139,971.38x = 209,914.01 × 40,104.82
4. Step 4: Simplify right side
   139,971.38x = 8,418,562,336.43
5. Step 5: Solve for x
   x = 8,418,562,336.43/139,971.38
6. Step 6: Final answer
   x = 60,144.88