Finding the Third Proportional to 636,579 and 920,605.50

Step by Step Solution

1. Step 1: Write the proportion equation
   636,579 : 920,605.50 = 920,605.50 : x
2. Step 2: Convert to fraction form
   636,579/920,605.50 = 920,605.50/x
3. Step 3: Cross multiply
   636,579x = 920,605.50 × 920,605.50
4. Step 4: Simplify right side
   636,579x = 847,514,486,630.25
5. Step 5: Solve for x
   x = 847,514,486,630.25/636,579
6. Step 6: Final answer
   x = 1,331,357.91