Finding the Third Proportional to 688,424 and 1,491,238

Step by Step Solution

1. Step 1: Write the proportion equation
   688,424 : 1,491,238 = 1,491,238 : x
2. Step 2: Convert to fraction form
   688,424/1,491,238 = 1,491,238/x
3. Step 3: Cross multiply
   688,424x = 1,491,238 × 1,491,238
4. Step 4: Simplify right side
   688,424x = 2,223,790,772,644
5. Step 5: Solve for x
   x = 2,223,790,772,644/688,424
6. Step 6: Final answer
   x = 3,230,263.29