Finding the Third Proportional to 688,320 and 1,036,645

Step by Step Solution

1. Step 1: Write the proportion equation
   688,320 : 1,036,645 = 1,036,645 : x
2. Step 2: Convert to fraction form
   688,320/1,036,645 = 1,036,645/x
3. Step 3: Cross multiply
   688,320x = 1,036,645 × 1,036,645
4. Step 4: Simplify right side
   688,320x = 1,074,632,856,025
5. Step 5: Solve for x
   x = 1,074,632,856,025/688,320
6. Step 6: Final answer
   x = 1,561,240.20