Finding the Fourth Proportional to 166,022.61, 248,805.50 and 71,139.21

Step by Step Solution

1. Step 1: Write the proportion equation
   166,022.61 : 248,805.50 = 71,139.21 : x
2. Step 2: Convert to fraction form
   166,022.61/248,805.50 = 71,139.21/x
3. Step 3: Cross multiply
   166,022.61x = 248,805.50 × 71,139.21
4. Step 4: Simplify right side
   166,022.61x = 17,699,826,357.96
5. Step 5: Solve for x
   x = 17,699,826,357.96/166,022.61
6. Step 6: Final answer
   x = 106,610.94