Finding the Third Proportional to 2,178,479 and 4,606,286

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178,479 : 4,606,286 = 4,606,286 : x
2. Step 2: Convert to fraction form
   2,178,479/4,606,286 = 4,606,286/x
3. Step 3: Cross multiply
   2,178,479x = 4,606,286 × 4,606,286
4. Step 4: Simplify right side
   2,178,479x = 21,217,870,713,796
5. Step 5: Solve for x
   x = 21,217,870,713,796/2,178,479
6. Step 6: Final answer
   x = 9,739,763.71