Finding the Third Proportional to 290,485.50 and 444,089

Step by Step Solution

1. Step 1: Write the proportion equation
   290,485.50 : 444,089 = 444,089 : x
2. Step 2: Convert to fraction form
   290,485.50/444,089 = 444,089/x
3. Step 3: Cross multiply
   290,485.50x = 444,089 × 444,089
4. Step 4: Simplify right side
   290,485.50x = 197,215,039,921
5. Step 5: Solve for x
   x = 197,215,039,921/290,485.50
6. Step 6: Final answer
   x = 678,915.26