Finding the Third Proportional to 111,729.38 and 263,518.31

Step by Step Solution

1. Step 1: Write the proportion equation
   111,729.38 : 263,518.31 = 263,518.31 : x
2. Step 2: Convert to fraction form
   111,729.38/263,518.31 = 263,518.31/x
3. Step 3: Cross multiply
   111,729.38x = 263,518.31 × 263,518.31
4. Step 4: Simplify right side
   111,729.38x = 69,441,901,022.85
5. Step 5: Solve for x
   x = 69,441,901,022.85/111,729.38
6. Step 6: Final answer
   x = 621,518.75