Finding the Third Proportional to 270,021 and 427,018.50

Step by Step Solution

1. Step 1: Write the proportion equation
   270,021 : 427,018.50 = 427,018.50 : x
2. Step 2: Convert to fraction form
   270,021/427,018.50 = 427,018.50/x
3. Step 3: Cross multiply
   270,021x = 427,018.50 × 427,018.50
4. Step 4: Simplify right side
   270,021x = 182,344,799,342.25
5. Step 5: Solve for x
   x = 182,344,799,342.25/270,021
6. Step 6: Final answer
   x = 675,298.59