Finding the Fourth Proportional to 231,906.78, 347,909.83 and 71,979.37

Step by Step Solution

1. Step 1: Write the proportion equation
   231,906.78 : 347,909.83 = 71,979.37 : x
2. Step 2: Convert to fraction form
   231,906.78/347,909.83 = 71,979.37/x
3. Step 3: Cross multiply
   231,906.78x = 347,909.83 × 71,979.37
4. Step 4: Simplify right side
   231,906.78x = 25,042,329,330.48
5. Step 5: Solve for x
   x = 25,042,329,330.48/231,906.78
6. Step 6: Final answer
   x = 107,984.46