Finding the Fourth Proportional to 139,843.46, 192,977.72 and 81,705.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139,843.46 : 192,977.72 = 81,705.56 : x
2. Step 2: Convert to fraction form
   139,843.46/192,977.72 = 81,705.56/x
3. Step 3: Cross multiply
   139,843.46x = 192,977.72 × 81,705.56
4. Step 4: Simplify right side
   139,843.46x = 15,767,352,680.12
5. Step 5: Solve for x
   x = 15,767,352,680.12/139,843.46
6. Step 6: Final answer
   x = 112,750.02