Finding the Fourth Proportional to 139,973.38, 209,917 and 40,106.82

Step by Step Solution

1. Step 1: Write the proportion equation
   139,973.38 : 209,917 = 40,106.82 : x
2. Step 2: Convert to fraction form
   139,973.38/209,917 = 40,106.82/x
3. Step 3: Cross multiply
   139,973.38x = 209,917 × 40,106.82
4. Step 4: Simplify right side
   139,973.38x = 8,419,103,333.94
5. Step 5: Solve for x
   x = 8,419,103,333.94/139,973.38
6. Step 6: Final answer
   x = 60,147.89