Finding the Fourth Proportional to 166,538, 229,826.09 and 91,086.50

Step by Step Solution

1. Step 1: Write the proportion equation
   166,538 : 229,826.09 = 91,086.50 : x
2. Step 2: Convert to fraction form
   166,538/229,826.09 = 91,086.50/x
3. Step 3: Cross multiply
   166,538x = 229,826.09 × 91,086.50
4. Step 4: Simplify right side
   166,538x = 20,934,054,146.79
5. Step 5: Solve for x
   x = 20,934,054,146.79/166,538
6. Step 6: Final answer
   x = 125,701.37