Finding the Third Proportional to 1,200,740 and 1,688,788

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200,740 : 1,688,788 = 1,688,788 : x
2. Step 2: Convert to fraction form
   1,200,740/1,688,788 = 1,688,788/x
3. Step 3: Cross multiply
   1,200,740x = 1,688,788 × 1,688,788
4. Step 4: Simplify right side
   1,200,740x = 2,852,004,908,944
5. Step 5: Solve for x
   x = 2,852,004,908,944/1,200,740
6. Step 6: Final answer
   x = 2,375,206.05