Finding the Third Proportional to 1,688,639 and 2,488,308

Step by Step Solution

1. Step 1: Write the proportion equation
   1,688,639 : 2,488,308 = 2,488,308 : x
2. Step 2: Convert to fraction form
   1,688,639/2,488,308 = 2,488,308/x
3. Step 3: Cross multiply
   1,688,639x = 2,488,308 × 2,488,308
4. Step 4: Simplify right side
   1,688,639x = 6,191,676,702,864
5. Step 5: Solve for x
   x = 6,191,676,702,864/1,688,639
6. Step 6: Final answer
   x = 3,666,666.89