Finding the Third Proportional to 1,215,129 and 2,659,110

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215,129 : 2,659,110 = 2,659,110 : x
2. Step 2: Convert to fraction form
   1,215,129/2,659,110 = 2,659,110/x
3. Step 3: Cross multiply
   1,215,129x = 2,659,110 × 2,659,110
4. Step 4: Simplify right side
   1,215,129x = 7,070,865,992,100
5. Step 5: Solve for x
   x = 7,070,865,992,100/1,215,129
6. Step 6: Final answer
   x = 5,819,024.97