Finding the Third Proportional to 1,215,612 and 2,645,280

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215,612 : 2,645,280 = 2,645,280 : x
2. Step 2: Convert to fraction form
   1,215,612/2,645,280 = 2,645,280/x
3. Step 3: Cross multiply
   1,215,612x = 2,645,280 × 2,645,280
4. Step 4: Simplify right side
   1,215,612x = 6,997,506,278,400
5. Step 5: Solve for x
   x = 6,997,506,278,400/1,215,612
6. Step 6: Final answer
   x = 5,756,364.92