Finding the Third Proportional to 640,995 and 928,420.50

Step by Step Solution

1. Step 1: Write the proportion equation
   640,995 : 928,420.50 = 928,420.50 : x
2. Step 2: Convert to fraction form
   640,995/928,420.50 = 928,420.50/x
3. Step 3: Cross multiply
   640,995x = 928,420.50 × 928,420.50
4. Step 4: Simplify right side
   640,995x = 861,964,624,820.25
5. Step 5: Solve for x
   x = 861,964,624,820.25/640,995
6. Step 6: Final answer
   x = 1,344,729.09