Finding the Third Proportional to 1,280,280 and 2,790,960

Step by Step Solution

1. Step 1: Write the proportion equation
   1,280,280 : 2,790,960 = 2,790,960 : x
2. Step 2: Convert to fraction form
   1,280,280/2,790,960 = 2,790,960/x
3. Step 3: Cross multiply
   1,280,280x = 2,790,960 × 2,790,960
4. Step 4: Simplify right side
   1,280,280x = 7,789,457,721,600
5. Step 5: Solve for x
   x = 7,789,457,721,600/1,280,280
6. Step 6: Final answer
   x = 6,084,182.93