Finding the Third Proportional to 1,369,780 and 2,129,256

Step by Step Solution

1. Step 1: Write the proportion equation
   1,369,780 : 2,129,256 = 2,129,256 : x
2. Step 2: Convert to fraction form
   1,369,780/2,129,256 = 2,129,256/x
3. Step 3: Cross multiply
   1,369,780x = 2,129,256 × 2,129,256
4. Step 4: Simplify right side
   1,369,780x = 4,533,731,113,536
5. Step 5: Solve for x
   x = 4,533,731,113,536/1,369,780
6. Step 6: Final answer
   x = 3,309,824.29