Finding the Third Proportional to 1,200,612 and 1,688,598

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200,612 : 1,688,598 = 1,688,598 : x
2. Step 2: Convert to fraction form
   1,200,612/1,688,598 = 1,688,598/x
3. Step 3: Cross multiply
   1,200,612x = 1,688,598 × 1,688,598
4. Step 4: Simplify right side
   1,200,612x = 2,851,363,205,604
5. Step 5: Solve for x
   x = 2,851,363,205,604/1,200,612
6. Step 6: Final answer
   x = 2,374,924.79