Finding the Third Proportional to 262,479 and 407,200.50

Step by Step Solution

1. Step 1: Write the proportion equation
   262,479 : 407,200.50 = 407,200.50 : x
2. Step 2: Convert to fraction form
   262,479/407,200.50 = 407,200.50/x
3. Step 3: Cross multiply
   262,479x = 407,200.50 × 407,200.50
4. Step 4: Simplify right side
   262,479x = 165,812,247,200.25
5. Step 5: Solve for x
   x = 165,812,247,200.25/262,479
6. Step 6: Final answer
   x = 631,716.24