Finding the Third Proportional to 1,638,936 and 3,547,440

Step by Step Solution

1. Step 1: Write the proportion equation
   1,638,936 : 3,547,440 = 3,547,440 : x
2. Step 2: Convert to fraction form
   1,638,936/3,547,440 = 3,547,440/x
3. Step 3: Cross multiply
   1,638,936x = 3,547,440 × 3,547,440
4. Step 4: Simplify right side
   1,638,936x = 12,584,330,553,600
5. Step 5: Solve for x
   x = 12,584,330,553,600/1,638,936
6. Step 6: Final answer
   x = 7,678,353.85