Finding the Third Proportional to 278,918 and 572,537.50

Step by Step Solution

1. Step 1: Write the proportion equation
   278,918 : 572,537.50 = 572,537.50 : x
2. Step 2: Convert to fraction form
   278,918/572,537.50 = 572,537.50/x
3. Step 3: Cross multiply
   278,918x = 572,537.50 × 572,537.50
4. Step 4: Simplify right side
   278,918x = 327,799,188,906.25
5. Step 5: Solve for x
   x = 327,799,188,906.25/278,918
6. Step 6: Final answer
   x = 1,175,252.90