Finding the Third Proportional to 1,687,440 and 3,640,068

Step by Step Solution

1. Step 1: Write the proportion equation
   1,687,440 : 3,640,068 = 3,640,068 : x
2. Step 2: Convert to fraction form
   1,687,440/3,640,068 = 3,640,068/x
3. Step 3: Cross multiply
   1,687,440x = 3,640,068 × 3,640,068
4. Step 4: Simplify right side
   1,687,440x = 13,250,095,044,624
5. Step 5: Solve for x
   x = 13,250,095,044,624/1,687,440
6. Step 6: Final answer
   x = 7,852,187.36