Finding the Fourth Proportional to 139,476.08, 192,456.96 and 82,081.28

Step by Step Solution

1. Step 1: Write the proportion equation
   139,476.08 : 192,456.96 = 82,081.28 : x
2. Step 2: Convert to fraction form
   139,476.08/192,456.96 = 82,081.28/x
3. Step 3: Cross multiply
   139,476.08x = 192,456.96 × 82,081.28
4. Step 4: Simplify right side
   139,476.08x = 15,797,113,621.71
5. Step 5: Solve for x
   x = 15,797,113,621.71/139,476.08
6. Step 6: Final answer
   x = 113,260.38