Finding the Third Proportional to 111,288 and 170,617.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,288 : 170,617.50 = 170,617.50 : x
2. Step 2: Convert to fraction form
   111,288/170,617.50 = 170,617.50/x
3. Step 3: Cross multiply
   111,288x = 170,617.50 × 170,617.50
4. Step 4: Simplify right side
   111,288x = 29,110,331,306.25
5. Step 5: Solve for x
   x = 29,110,331,306.25/111,288
6. Step 6: Final answer
   x = 261,576.55