Finding the Third Proportional to 298,015.50 and 646,491

Step by Step Solution

1. Step 1: Write the proportion equation
   298,015.50 : 646,491 = 646,491 : x
2. Step 2: Convert to fraction form
   298,015.50/646,491 = 646,491/x
3. Step 3: Cross multiply
   298,015.50x = 646,491 × 646,491
4. Step 4: Simplify right side
   298,015.50x = 417,950,613,081
5. Step 5: Solve for x
   x = 417,950,613,081/298,015.50
6. Step 6: Final answer
   x = 1,402,445.89