Finding the Fourth Proportional to 264,196.50, 396,211.56 and 86,662.26

Step by Step Solution

1. Step 1: Write the proportion equation
   264,196.50 : 396,211.56 = 86,662.26 : x
2. Step 2: Convert to fraction form
   264,196.50/396,211.56 = 86,662.26/x
3. Step 3: Cross multiply
   264,196.50x = 396,211.56 × 86,662.26
4. Step 4: Simplify right side
   264,196.50x = 34,336,589,227.73
5. Step 5: Solve for x
   x = 34,336,589,227.73/264,196.50
6. Step 6: Final answer
   x = 129,966.10