Finding the Third Proportional to 111,126.50 and 262,215

Step by Step Solution

1. Step 1: Write the proportion equation
   111,126.50 : 262,215 = 262,215 : x
2. Step 2: Convert to fraction form
   111,126.50/262,215 = 262,215/x
3. Step 3: Cross multiply
   111,126.50x = 262,215 × 262,215
4. Step 4: Simplify right side
   111,126.50x = 68,756,706,225
5. Step 5: Solve for x
   x = 68,756,706,225/111,126.50
6. Step 6: Final answer
   x = 618,724.66