Finding the Third Proportional to 388,476 and 524,839.50

Step by Step Solution

1. Step 1: Write the proportion equation
   388,476 : 524,839.50 = 524,839.50 : x
2. Step 2: Convert to fraction form
   388,476/524,839.50 = 524,839.50/x
3. Step 3: Cross multiply
   388,476x = 524,839.50 × 524,839.50
4. Step 4: Simplify right side
   388,476x = 275,456,500,760.25
5. Step 5: Solve for x
   x = 275,456,500,760.25/388,476
6. Step 6: Final answer
   x = 709,069.55