Finding the Third Proportional to 1,218,700 and 2,640,792

Step by Step Solution

1. Step 1: Write the proportion equation
   1,218,700 : 2,640,792 = 2,640,792 : x
2. Step 2: Convert to fraction form
   1,218,700/2,640,792 = 2,640,792/x
3. Step 3: Cross multiply
   1,218,700x = 2,640,792 × 2,640,792
4. Step 4: Simplify right side
   1,218,700x = 6,973,782,387,264
5. Step 5: Solve for x
   x = 6,973,782,387,264/1,218,700
6. Step 6: Final answer
   x = 5,722,312.62