Finding the Third Proportional to 678,965.50 and 1,488,503

Step by Step Solution

1. Step 1: Write the proportion equation
   678,965.50 : 1,488,503 = 1,488,503 : x
2. Step 2: Convert to fraction form
   678,965.50/1,488,503 = 1,488,503/x
3. Step 3: Cross multiply
   678,965.50x = 1,488,503 × 1,488,503
4. Step 4: Simplify right side
   678,965.50x = 2,215,641,181,009
5. Step 5: Solve for x
   x = 2,215,641,181,009/678,965.50
6. Step 6: Final answer
   x = 3,263,260.33