Finding the Third Proportional to 120,510 and 262,453.50

Step by Step Solution

1. Step 1: Write the proportion equation
   120,510 : 262,453.50 = 262,453.50 : x
2. Step 2: Convert to fraction form
   120,510/262,453.50 = 262,453.50/x
3. Step 3: Cross multiply
   120,510x = 262,453.50 × 262,453.50
4. Step 4: Simplify right side
   120,510x = 68,881,839,662.25
5. Step 5: Solve for x
   x = 68,881,839,662.25/120,510
6. Step 6: Final answer
   x = 571,586.09