Finding the Fourth Proportional to 139,665.23, 192,758.77 and 82,286.21

Step by Step Solution

1. Step 1: Write the proportion equation
   139,665.23 : 192,758.77 = 82,286.21 : x
2. Step 2: Convert to fraction form
   139,665.23/192,758.77 = 82,286.21/x
3. Step 3: Cross multiply
   139,665.23x = 192,758.77 × 82,286.21
4. Step 4: Simplify right side
   139,665.23x = 15,861,387,663.77
5. Step 5: Solve for x
   x = 15,861,387,663.77/139,665.23
6. Step 6: Final answer
   x = 113,567.19