Finding the Third Proportional to 661,912 and 1,428,800

Step by Step Solution

1. Step 1: Write the proportion equation
   661,912 : 1,428,800 = 1,428,800 : x
2. Step 2: Convert to fraction form
   661,912/1,428,800 = 1,428,800/x
3. Step 3: Cross multiply
   661,912x = 1,428,800 × 1,428,800
4. Step 4: Simplify right side
   661,912x = 2,041,469,440,000
5. Step 5: Solve for x
   x = 2,041,469,440,000/661,912
6. Step 6: Final answer
   x = 3,084,200.68