Finding the Third Proportional to 641,976 and 1,518,200

Step by Step Solution

1. Step 1: Write the proportion equation
   641,976 : 1,518,200 = 1,518,200 : x
2. Step 2: Convert to fraction form
   641,976/1,518,200 = 1,518,200/x
3. Step 3: Cross multiply
   641,976x = 1,518,200 × 1,518,200
4. Step 4: Simplify right side
   641,976x = 2,304,931,240,000
5. Step 5: Solve for x
   x = 2,304,931,240,000/641,976
6. Step 6: Final answer
   x = 3,590,369.80