Finding the Third Proportional to 1,217,916 and 2,617,272

Step by Step Solution

1. Step 1: Write the proportion equation
   1,217,916 : 2,617,272 = 2,617,272 : x
2. Step 2: Convert to fraction form
   1,217,916/2,617,272 = 2,617,272/x
3. Step 3: Cross multiply
   1,217,916x = 2,617,272 × 2,617,272
4. Step 4: Simplify right side
   1,217,916x = 6,850,112,721,984
5. Step 5: Solve for x
   x = 6,850,112,721,984/1,217,916
6. Step 6: Final answer
   x = 5,624,454.17