Finding the Third Proportional to 1,213,434 and 2,640,829

Step by Step Solution

1. Step 1: Write the proportion equation
   1,213,434 : 2,640,829 = 2,640,829 : x
2. Step 2: Convert to fraction form
   1,213,434/2,640,829 = 2,640,829/x
3. Step 3: Cross multiply
   1,213,434x = 2,640,829 × 2,640,829
4. Step 4: Simplify right side
   1,213,434x = 6,973,977,807,241
5. Step 5: Solve for x
   x = 6,973,977,807,241/1,213,434
6. Step 6: Final answer
   x = 5,747,307.07