Finding the Third Proportional to 211,428 and 443,616

Step by Step Solution

1. Step 1: Write the proportion equation
   211,428 : 443,616 = 443,616 : x
2. Step 2: Convert to fraction form
   211,428/443,616 = 443,616/x
3. Step 3: Cross multiply
   211,428x = 443,616 × 443,616
4. Step 4: Simplify right side
   211,428x = 196,795,155,456
5. Step 5: Solve for x
   x = 196,795,155,456/211,428
6. Step 6: Final answer
   x = 930,790.41