Finding the Third Proportional to 1,638,972 and 2,571,072

Step by Step Solution

1. Step 1: Write the proportion equation
   1,638,972 : 2,571,072 = 2,571,072 : x
2. Step 2: Convert to fraction form
   1,638,972/2,571,072 = 2,571,072/x
3. Step 3: Cross multiply
   1,638,972x = 2,571,072 × 2,571,072
4. Step 4: Simplify right side
   1,638,972x = 6,610,411,229,184
5. Step 5: Solve for x
   x = 6,610,411,229,184/1,638,972
6. Step 6: Final answer
   x = 4,033,266.72