Finding the Third Proportional to 1,200,915 and 2,638,025

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200,915 : 2,638,025 = 2,638,025 : x
2. Step 2: Convert to fraction form
   1,200,915/2,638,025 = 2,638,025/x
3. Step 3: Cross multiply
   1,200,915x = 2,638,025 × 2,638,025
4. Step 4: Simplify right side
   1,200,915x = 6,959,175,900,625
5. Step 5: Solve for x
   x = 6,959,175,900,625/1,200,915
6. Step 6: Final answer
   x = 5,794,894.64