Finding the Third Proportional to 2,178,688 and 4,787,338

Step by Step Solution

1. Step 1: Write the proportion equation
   2,178,688 : 4,787,338 = 4,787,338 : x
2. Step 2: Convert to fraction form
   2,178,688/4,787,338 = 4,787,338/x
3. Step 3: Cross multiply
   2,178,688x = 4,787,338 × 4,787,338
4. Step 4: Simplify right side
   2,178,688x = 22,918,605,126,244
5. Step 5: Solve for x
   x = 22,918,605,126,244/2,178,688
6. Step 6: Final answer
   x = 10,519,452.59