Finding the Third Proportional to 305,242.50 and 663,018

Step by Step Solution

1. Step 1: Write the proportion equation
   305,242.50 : 663,018 = 663,018 : x
2. Step 2: Convert to fraction form
   305,242.50/663,018 = 663,018/x
3. Step 3: Cross multiply
   305,242.50x = 663,018 × 663,018
4. Step 4: Simplify right side
   305,242.50x = 439,592,868,324
5. Step 5: Solve for x
   x = 439,592,868,324/305,242.50
6. Step 6: Final answer
   x = 1,440,143.06