Finding the Third Proportional to 361,608 and 777,637.50

Step by Step Solution

1. Step 1: Write the proportion equation
   361,608 : 777,637.50 = 777,637.50 : x
2. Step 2: Convert to fraction form
   361,608/777,637.50 = 777,637.50/x
3. Step 3: Cross multiply
   361,608x = 777,637.50 × 777,637.50
4. Step 4: Simplify right side
   361,608x = 604,720,081,406.25
5. Step 5: Solve for x
   x = 604,720,081,406.25/361,608
6. Step 6: Final answer
   x = 1,672,308.36