Finding the Third Proportional to 268,730 and 388,469.50

Step by Step Solution

1. Step 1: Write the proportion equation
   268,730 : 388,469.50 = 388,469.50 : x
2. Step 2: Convert to fraction form
   268,730/388,469.50 = 388,469.50/x
3. Step 3: Cross multiply
   268,730x = 388,469.50 × 388,469.50
4. Step 4: Simplify right side
   268,730x = 150,908,552,430.25
5. Step 5: Solve for x
   x = 150,908,552,430.25/268,730
6. Step 6: Final answer
   x = 561,561.99