Finding the Third Proportional to 111,292.50 and 262,455

Step by Step Solution

1. Step 1: Write the proportion equation
   111,292.50 : 262,455 = 262,455 : x
2. Step 2: Convert to fraction form
   111,292.50/262,455 = 262,455/x
3. Step 3: Cross multiply
   111,292.50x = 262,455 × 262,455
4. Step 4: Simplify right side
   111,292.50x = 68,882,627,025
5. Step 5: Solve for x
   x = 68,882,627,025/111,292.50
6. Step 6: Final answer
   x = 618,933.23