Finding the Third Proportional to 2,618,932 and 5,638,328

Step by Step Solution

1. Step 1: Write the proportion equation
   2,618,932 : 5,638,328 = 5,638,328 : x
2. Step 2: Convert to fraction form
   2,618,932/5,638,328 = 5,638,328/x
3. Step 3: Cross multiply
   2,618,932x = 5,638,328 × 5,638,328
4. Step 4: Simplify right side
   2,618,932x = 31,790,742,635,584
5. Step 5: Solve for x
   x = 31,790,742,635,584/2,618,932
6. Step 6: Final answer
   x = 12,138,819.43