Finding the Fourth Proportional to 139,336.02, 192,287.52 and 81,979.38

Step by Step Solution

1. Step 1: Write the proportion equation
   139,336.02 : 192,287.52 = 81,979.38 : x
2. Step 2: Convert to fraction form
   139,336.02/192,287.52 = 81,979.38/x
3. Step 3: Cross multiply
   139,336.02x = 192,287.52 × 81,979.38
4. Step 4: Simplify right side
   139,336.02x = 15,763,611,671.34
5. Step 5: Solve for x
   x = 15,763,611,671.34/139,336.02
6. Step 6: Final answer
   x = 113,133.79