Finding the Third Proportional to 691,200 and 1,036,800

Step by Step Solution

1. Step 1: Write the proportion equation
   691,200 : 1,036,800 = 1,036,800 : x
2. Step 2: Convert to fraction form
   691,200/1,036,800 = 1,036,800/x
3. Step 3: Cross multiply
   691,200x = 1,036,800 × 1,036,800
4. Step 4: Simplify right side
   691,200x = 1,074,954,240,000
5. Step 5: Solve for x
   x = 1,074,954,240,000/691,200
6. Step 6: Final answer
   x = 1,555,200