Finding the Third Proportional to 260,244 and 388,200

Step by Step Solution

1. Step 1: Write the proportion equation
   260,244 : 388,200 = 388,200 : x
2. Step 2: Convert to fraction form
   260,244/388,200 = 388,200/x
3. Step 3: Cross multiply
   260,244x = 388,200 × 388,200
4. Step 4: Simplify right side
   260,244x = 150,699,240,000
5. Step 5: Solve for x
   x = 150,699,240,000/260,244
6. Step 6: Final answer
   x = 579,069.03