Finding the Third Proportional to 2,178,612 and 4,787,280

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178,612 : 4,787,280 = 4,787,280 : x
2. Step 2: Convert to fraction form
   2,178,612/4,787,280 = 4,787,280/x
3. Step 3: Cross multiply
   2,178,612x = 4,787,280 × 4,787,280
4. Step 4: Simplify right side
   2,178,612x = 22,918,049,798,400
5. Step 5: Solve for x
   x = 22,918,049,798,400/2,178,612
6. Step 6: Final answer
   x = 10,519,564.66