Finding the Fourth Proportional to 84,399.66, 126,688.71 and 82,493.72

Step by Step Solution

1. Step 1: Write the proportion equation
   84,399.66 : 126,688.71 = 82,493.72 : x
2. Step 2: Convert to fraction form
   84,399.66/126,688.71 = 82,493.72/x
3. Step 3: Cross multiply
   84,399.66x = 126,688.71 × 82,493.72
4. Step 4: Simplify right side
   84,399.66x = 10,451,023,102.25
5. Step 5: Solve for x
   x = 10,451,023,102.25/84,399.66
6. Step 6: Final answer
   x = 123,827.79