Finding the Third Proportional to 111,616.31 and 263,432.25

Step by Step Solution

1. Step 1: Write the proportion equation
   111,616.31 : 263,432.25 = 263,432.25 : x
2. Step 2: Convert to fraction form
   111,616.31/263,432.25 = 263,432.25/x
3. Step 3: Cross multiply
   111,616.31x = 263,432.25 × 263,432.25
4. Step 4: Simplify right side
   111,616.31x = 69,396,550,340.06
5. Step 5: Solve for x
   x = 69,396,550,340.06/111,616.31
6. Step 6: Final answer
   x = 621,742.01