Finding the Third Proportional to 281,778 and 664,507.50

Step by Step Solution

1. Step 1: Write the proportion equation
   281,778 : 664,507.50 = 664,507.50 : x
2. Step 2: Convert to fraction form
   281,778/664,507.50 = 664,507.50/x
3. Step 3: Cross multiply
   281,778x = 664,507.50 × 664,507.50
4. Step 4: Simplify right side
   281,778x = 441,570,217,556.25
5. Step 5: Solve for x
   x = 441,570,217,556.25/281,778
6. Step 6: Final answer
   x = 1,567,085.50