Finding the Third Proportional to 1,200,291 and 1,688,169

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200,291 : 1,688,169 = 1,688,169 : x
2. Step 2: Convert to fraction form
   1,200,291/1,688,169 = 1,688,169/x
3. Step 3: Cross multiply
   1,200,291x = 1,688,169 × 1,688,169
4. Step 4: Simplify right side
   1,200,291x = 2,849,914,572,561
5. Step 5: Solve for x
   x = 2,849,914,572,561/1,200,291
6. Step 6: Final answer
   x = 2,374,353.03