Finding the Fourth Proportional to 81,196.62, 111,978.63 and 50,984.79

Step by Step Solution

1. Step 1: Write the proportion equation
   81,196.62 : 111,978.63 = 50,984.79 : x
2. Step 2: Convert to fraction form
   81,196.62/111,978.63 = 50,984.79/x
3. Step 3: Cross multiply
   81,196.62x = 111,978.63 × 50,984.79
4. Step 4: Simplify right side
   81,196.62x = 5,709,206,935.04
5. Step 5: Solve for x
   x = 5,709,206,935.04/81,196.62
6. Step 6: Final answer
   x = 70,313.36