Finding the Third Proportional to 1,290,816 and 2,799,360

Step by Step Solution

1. Step 1: Write the proportion equation
   1,290,816 : 2,799,360 = 2,799,360 : x
2. Step 2: Convert to fraction form
   1,290,816/2,799,360 = 2,799,360/x
3. Step 3: Cross multiply
   1,290,816x = 2,799,360 × 2,799,360
4. Step 4: Simplify right side
   1,290,816x = 7,836,416,409,600
5. Step 5: Solve for x
   x = 7,836,416,409,600/1,290,816
6. Step 6: Final answer
   x = 6,070,901.20