Finding the Third Proportional to 1,615,780 and 3,398,696

Step by Step Solution

1. Step 1: Write the proportion equation
   1,615,780 : 3,398,696 = 3,398,696 : x
2. Step 2: Convert to fraction form
   1,615,780/3,398,696 = 3,398,696/x
3. Step 3: Cross multiply
   1,615,780x = 3,398,696 × 3,398,696
4. Step 4: Simplify right side
   1,615,780x = 11,551,134,500,416
5. Step 5: Solve for x
   x = 11,551,134,500,416/1,615,780
6. Step 6: Final answer
   x = 7,148,952.52