Finding the Third Proportional to 189,918 and 443,691

Step by Step Solution

1. Step 1: Write the proportion equation
   189,918 : 443,691 = 443,691 : x
2. Step 2: Convert to fraction form
   189,918/443,691 = 443,691/x
3. Step 3: Cross multiply
   189,918x = 443,691 × 443,691
4. Step 4: Simplify right side
   189,918x = 196,861,703,481
5. Step 5: Solve for x
   x = 196,861,703,481/189,918
6. Step 6: Final answer
   x = 1,036,561.59