Finding the Fourth Proportional to 139,834.58, 192,965.49 and 81,696.71

Step by Step Solution

1. Step 1: Write the proportion equation
   139,834.58 : 192,965.49 = 81,696.71 : x
2. Step 2: Convert to fraction form
   139,834.58/192,965.49 = 81,696.71/x
3. Step 3: Cross multiply
   139,834.58x = 192,965.49 × 81,696.71
4. Step 4: Simplify right side
   139,834.58x = 15,764,644,711.71
5. Step 5: Solve for x
   x = 15,764,644,711.71/139,834.58
6. Step 6: Final answer
   x = 112,737.82