Finding the Third Proportional to 1,200,648 and 2,540,688

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200,648 : 2,540,688 = 2,540,688 : x
2. Step 2: Convert to fraction form
   1,200,648/2,540,688 = 2,540,688/x
3. Step 3: Cross multiply
   1,200,648x = 2,540,688 × 2,540,688
4. Step 4: Simplify right side
   1,200,648x = 6,455,095,513,344
5. Step 5: Solve for x
   x = 6,455,095,513,344/1,200,648
6. Step 6: Final answer
   x = 5,376,343.04