Finding the Fourth Proportional to 139,399.79, 192,387.96 and 82,811.16

Step by Step Solution

1. Step 1: Write the proportion equation
   139,399.79 : 192,387.96 = 82,811.16 : x
2. Step 2: Convert to fraction form
   139,399.79/192,387.96 = 82,811.16/x
3. Step 3: Cross multiply
   139,399.79x = 192,387.96 × 82,811.16
4. Step 4: Simplify right side
   139,399.79x = 15,931,870,137.63
5. Step 5: Solve for x
   x = 15,931,870,137.63/139,399.79
6. Step 6: Final answer
   x = 114,289.06