Finding the Third Proportional to 307,719 and 694,453.50

Step by Step Solution

1. Step 1: Write the proportion equation
   307,719 : 694,453.50 = 694,453.50 : x
2. Step 2: Convert to fraction form
   307,719/694,453.50 = 694,453.50/x
3. Step 3: Cross multiply
   307,719x = 694,453.50 × 694,453.50
4. Step 4: Simplify right side
   307,719x = 482,265,663,662.25
5. Step 5: Solve for x
   x = 482,265,663,662.25/307,719
6. Step 6: Final answer
   x = 1,567,227.45