Finding the Third Proportional to 497,131 and 777,685.50

Step by Step Solution

1. Step 1: Write the proportion equation
   497,131 : 777,685.50 = 777,685.50 : x
2. Step 2: Convert to fraction form
   497,131/777,685.50 = 777,685.50/x
3. Step 3: Cross multiply
   497,131x = 777,685.50 × 777,685.50
4. Step 4: Simplify right side
   497,131x = 604,794,736,910.25
5. Step 5: Solve for x
   x = 604,794,736,910.25/497,131
6. Step 6: Final answer
   x = 1,216,570.15