Finding the Third Proportional to 2,602,838 and 5,640,066

Step by Step Solution

1. Step 1: Write the proportion equation
   2,602,838 : 5,640,066 = 5,640,066 : x
2. Step 2: Convert to fraction form
   2,602,838/5,640,066 = 5,640,066/x
3. Step 3: Cross multiply
   2,602,838x = 5,640,066 × 5,640,066
4. Step 4: Simplify right side
   2,602,838x = 31,810,344,484,356
5. Step 5: Solve for x
   x = 31,810,344,484,356/2,602,838
6. Step 6: Final answer
   x = 12,221,407.74