Finding the Fourth Proportional to 139,017.87, 208,494.81 and 82,873.80

Step by Step Solution

1. Step 1: Write the proportion equation
   139,017.87 : 208,494.81 = 82,873.80 : x
2. Step 2: Convert to fraction form
   139,017.87/208,494.81 = 82,873.80/x
3. Step 3: Cross multiply
   139,017.87x = 208,494.81 × 82,873.80
4. Step 4: Simplify right side
   139,017.87x = 17,278,757,184.98
5. Step 5: Solve for x
   x = 17,278,757,184.98/139,017.87
6. Step 6: Final answer
   x = 124,291.63