Finding the Third Proportional to 2,602,217 and 5,638,837

Step by Step Solution

1. Step 1: Write the proportion equation
   2,602,217 : 5,638,837 = 5,638,837 : x
2. Step 2: Convert to fraction form
   2,602,217/5,638,837 = 5,638,837/x
3. Step 3: Cross multiply
   2,602,217x = 5,638,837 × 5,638,837
4. Step 4: Simplify right side
   2,602,217x = 31,796,482,712,569
5. Step 5: Solve for x
   x = 31,796,482,712,569/2,602,217
6. Step 6: Final answer
   x = 12,218,997.38