Finding the Third Proportional to 268,222 and 402,338.50

Step by Step Solution

1. Step 1: Write the proportion equation
   268,222 : 402,338.50 = 402,338.50 : x
2. Step 2: Convert to fraction form
   268,222/402,338.50 = 402,338.50/x
3. Step 3: Cross multiply
   268,222x = 402,338.50 × 402,338.50
4. Step 4: Simplify right side
   268,222x = 161,876,268,582.25
5. Step 5: Solve for x
   x = 161,876,268,582.25/268,222
6. Step 6: Final answer
   x = 603,516.00