Finding the Third Proportional to 356,421 and 471,124.50

Step by Step Solution

1. Step 1: Write the proportion equation
   356,421 : 471,124.50 = 471,124.50 : x
2. Step 2: Convert to fraction form
   356,421/471,124.50 = 471,124.50/x
3. Step 3: Cross multiply
   356,421x = 471,124.50 × 471,124.50
4. Step 4: Simplify right side
   356,421x = 221,958,294,500.25
5. Step 5: Solve for x
   x = 221,958,294,500.25/356,421
6. Step 6: Final answer
   x = 622,741.91