Finding the Third Proportional to 2,638,207 and 5,781,430

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638,207 : 5,781,430 = 5,781,430 : x
2. Step 2: Convert to fraction form
   2,638,207/5,781,430 = 5,781,430/x
3. Step 3: Cross multiply
   2,638,207x = 5,781,430 × 5,781,430
4. Step 4: Simplify right side
   2,638,207x = 33,424,932,844,900
5. Step 5: Solve for x
   x = 33,424,932,844,900/2,638,207
6. Step 6: Final answer
   x = 12,669,564.16