Finding the Third Proportional to 687,630 and 1,051,213.50

Step by Step Solution

1. Step 1: Write the proportion equation
   687,630 : 1,051,213.50 = 1,051,213.50 : x
2. Step 2: Convert to fraction form
   687,630/1,051,213.50 = 1,051,213.50/x
3. Step 3: Cross multiply
   687,630x = 1,051,213.50 × 1,051,213.50
4. Step 4: Simplify right side
   687,630x = 1,105,049,822,582.25
5. Step 5: Solve for x
   x = 1,105,049,822,582.25/687,630
6. Step 6: Final answer
   x = 1,607,041.32