Finding the Third Proportional to 2,618,934 and 5,638,332

Step by Step Solution

1. Step 1: Write the proportion equation
   2,618,934 : 5,638,332 = 5,638,332 : x
2. Step 2: Convert to fraction form
   2,618,934/5,638,332 = 5,638,332/x
3. Step 3: Cross multiply
   2,618,934x = 5,638,332 × 5,638,332
4. Step 4: Simplify right side
   2,618,934x = 31,790,787,742,224
5. Step 5: Solve for x
   x = 31,790,787,742,224/2,618,934
6. Step 6: Final answer
   x = 12,138,827.38