Finding the Third Proportional to 640,089 and 961,834.50

Step by Step Solution

1. Step 1: Write the proportion equation
   640,089 : 961,834.50 = 961,834.50 : x
2. Step 2: Convert to fraction form
   640,089/961,834.50 = 961,834.50/x
3. Step 3: Cross multiply
   640,089x = 961,834.50 × 961,834.50
4. Step 4: Simplify right side
   640,089x = 925,125,605,390.25
5. Step 5: Solve for x
   x = 925,125,605,390.25/640,089
6. Step 6: Final answer
   x = 1,445,307.77