Finding the Third Proportional to 647,280 and 1,005,000

Step by Step Solution

1. Step 1: Write the proportion equation
   647,280 : 1,005,000 = 1,005,000 : x
2. Step 2: Convert to fraction form
   647,280/1,005,000 = 1,005,000/x
3. Step 3: Cross multiply
   647,280x = 1,005,000 × 1,005,000
4. Step 4: Simplify right side
   647,280x = 1,010,025,000,000
5. Step 5: Solve for x
   x = 1,010,025,000,000/647,280
6. Step 6: Final answer
   x = 1,560,414.35