Finding the Third Proportional to 688,414 and 1,491,210

Step by Step Solution

1. Step 1: Write the proportion equation
   688,414 : 1,491,210 = 1,491,210 : x
2. Step 2: Convert to fraction form
   688,414/1,491,210 = 1,491,210/x
3. Step 3: Cross multiply
   688,414x = 1,491,210 × 1,491,210
4. Step 4: Simplify right side
   688,414x = 2,223,707,264,100
5. Step 5: Solve for x
   x = 2,223,707,264,100/688,414
6. Step 6: Final answer
   x = 3,230,188.90