Finding the Third Proportional to 1,278,720 and 1,909,324

Step by Step Solution

1. Step 1: Write the proportion equation
   1,278,720 : 1,909,324 = 1,909,324 : x
2. Step 2: Convert to fraction form
   1,278,720/1,909,324 = 1,909,324/x
3. Step 3: Cross multiply
   1,278,720x = 1,909,324 × 1,909,324
4. Step 4: Simplify right side
   1,278,720x = 3,645,518,136,976
5. Step 5: Solve for x
   x = 3,645,518,136,976/1,278,720
6. Step 6: Final answer
   x = 2,850,911.96