Finding the Third Proportional to 647,400 and 980,100

Step by Step Solution

1. Step 1: Write the proportion equation
   647,400 : 980,100 = 980,100 : x
2. Step 2: Convert to fraction form
   647,400/980,100 = 980,100/x
3. Step 3: Cross multiply
   647,400x = 980,100 × 980,100
4. Step 4: Simplify right side
   647,400x = 960,596,010,000
5. Step 5: Solve for x
   x = 960,596,010,000/647,400
6. Step 6: Final answer
   x = 1,483,775.12