Finding the Third Proportional to 278,635.50 and 610,668

Step by Step Solution

1. Step 1: Write the proportion equation
   278,635.50 : 610,668 = 610,668 : x
2. Step 2: Convert to fraction form
   278,635.50/610,668 = 610,668/x
3. Step 3: Cross multiply
   278,635.50x = 610,668 × 610,668
4. Step 4: Simplify right side
   278,635.50x = 372,915,406,224
5. Step 5: Solve for x
   x = 372,915,406,224/278,635.50
6. Step 6: Final answer
   x = 1,338,362.87