Finding the Third Proportional to 647,280 and 1,320,264

Step by Step Solution

1. Step 1: Write the proportion equation
   647,280 : 1,320,264 = 1,320,264 : x
2. Step 2: Convert to fraction form
   647,280/1,320,264 = 1,320,264/x
3. Step 3: Cross multiply
   647,280x = 1,320,264 × 1,320,264
4. Step 4: Simplify right side
   647,280x = 1,743,097,029,696
5. Step 5: Solve for x
   x = 1,743,097,029,696/647,280
6. Step 6: Final answer
   x = 2,692,956.73