Finding the Third Proportional to 688,435.50 and 1,491,243

Step by Step Solution

1. Step 1: Write the proportion equation
   688,435.50 : 1,491,243 = 1,491,243 : x
2. Step 2: Convert to fraction form
   688,435.50/1,491,243 = 1,491,243/x
3. Step 3: Cross multiply
   688,435.50x = 1,491,243 × 1,491,243
4. Step 4: Simplify right side
   688,435.50x = 2,223,805,685,049
5. Step 5: Solve for x
   x = 2,223,805,685,049/688,435.50
6. Step 6: Final answer
   x = 3,230,230.99