Finding the Third Proportional to 645,572 and 1,317,388

Step by Step Solution

1. Step 1: Write the proportion equation
   645,572 : 1,317,388 = 1,317,388 : x
2. Step 2: Convert to fraction form
   645,572/1,317,388 = 1,317,388/x
3. Step 3: Cross multiply
   645,572x = 1,317,388 × 1,317,388
4. Step 4: Simplify right side
   645,572x = 1,735,511,142,544
5. Step 5: Solve for x
   x = 1,735,511,142,544/645,572
6. Step 6: Final answer
   x = 2,688,330.88