Finding the Third Proportional to 111,606.75 and 263,412

Step by Step Solution

1. Step 1: Write the proportion equation
   111,606.75 : 263,412 = 263,412 : x
2. Step 2: Convert to fraction form
   111,606.75/263,412 = 263,412/x
3. Step 3: Cross multiply
   111,606.75x = 263,412 × 263,412
4. Step 4: Simplify right side
   111,606.75x = 69,385,881,744
5. Step 5: Solve for x
   x = 69,385,881,744/111,606.75
6. Step 6: Final answer
   x = 621,699.69