Finding the Third Proportional to 688,408 and 1,491,224

Step by Step Solution

1. Step 1: Write the proportion equation
   688,408 : 1,491,224 = 1,491,224 : x
2. Step 2: Convert to fraction form
   688,408/1,491,224 = 1,491,224/x
3. Step 3: Cross multiply
   688,408x = 1,491,224 × 1,491,224
4. Step 4: Simplify right side
   688,408x = 2,223,749,018,176
5. Step 5: Solve for x
   x = 2,223,749,018,176/688,408
6. Step 6: Final answer
   x = 3,230,277.71