Finding the Third Proportional to 290,092 and 443,724

Step by Step Solution

1. Step 1: Write the proportion equation
   290,092 : 443,724 = 443,724 : x
2. Step 2: Convert to fraction form
   290,092/443,724 = 443,724/x
3. Step 3: Cross multiply
   290,092x = 443,724 × 443,724
4. Step 4: Simplify right side
   290,092x = 196,890,988,176
5. Step 5: Solve for x
   x = 196,890,988,176/290,092
6. Step 6: Final answer
   x = 678,719.12