Finding the Fourth Proportional to 82,065, 113,221.42 and 49,809.78

Step by Step Solution

1. Step 1: Write the proportion equation
   82,065 : 113,221.42 = 49,809.78 : x
2. Step 2: Convert to fraction form
   82,065/113,221.42 = 49,809.78/x
3. Step 3: Cross multiply
   82,065x = 113,221.42 × 49,809.78
4. Step 4: Simplify right side
   82,065x = 5,639,534,021.49
5. Step 5: Solve for x
   x = 5,639,534,021.49/82,065
6. Step 6: Final answer
   x = 68,720.33