Finding the Third Proportional to 2,178,630 and 4,787,316

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178,630 : 4,787,316 = 4,787,316 : x
2. Step 2: Convert to fraction form
   2,178,630/4,787,316 = 4,787,316/x
3. Step 3: Cross multiply
   2,178,630x = 4,787,316 × 4,787,316
4. Step 4: Simplify right side
   2,178,630x = 22,918,394,483,856
5. Step 5: Solve for x
   x = 22,918,394,483,856/2,178,630
6. Step 6: Final answer
   x = 10,519,635.96