Finding the Third Proportional to 2,586,440 and 5,620,512

Step by Step Solution

1. Step 1: Write the proportion equation
   2,586,440 : 5,620,512 = 5,620,512 : x
2. Step 2: Convert to fraction form
   2,586,440/5,620,512 = 5,620,512/x
3. Step 3: Cross multiply
   2,586,440x = 5,620,512 × 5,620,512
4. Step 4: Simplify right side
   2,586,440x = 31,590,155,142,144
5. Step 5: Solve for x
   x = 31,590,155,142,144/2,586,440
6. Step 6: Final answer
   x = 12,213,759.12