Finding the Fourth Proportional to 81,665.69, 122,249.75 and 65,722.46

Step by Step Solution

1. Step 1: Write the proportion equation
   81,665.69 : 122,249.75 = 65,722.46 : x
2. Step 2: Convert to fraction form
   81,665.69/122,249.75 = 65,722.46/x
3. Step 3: Cross multiply
   81,665.69x = 122,249.75 × 65,722.46
4. Step 4: Simplify right side
   81,665.69x = 8,034,553,364.52
5. Step 5: Solve for x
   x = 8,034,553,364.52/81,665.69
6. Step 6: Final answer
   x = 98,383.47