Finding the Third Proportional to 1,213,521 and 2,638,770

Step by Step Solution

1. Step 1: Write the proportion equation
   1,213,521 : 2,638,770 = 2,638,770 : x
2. Step 2: Convert to fraction form
   1,213,521/2,638,770 = 2,638,770/x
3. Step 3: Cross multiply
   1,213,521x = 2,638,770 × 2,638,770
4. Step 4: Simplify right side
   1,213,521x = 6,963,107,112,900
5. Step 5: Solve for x
   x = 6,963,107,112,900/1,213,521
6. Step 6: Final answer
   x = 5,737,937.05