Finding the Third Proportional to 748,598 and 1,590,638

Step by Step Solution

1. Step 1: Write the proportion equation
   748,598 : 1,590,638 = 1,590,638 : x
2. Step 2: Convert to fraction form
   748,598/1,590,638 = 1,590,638/x
3. Step 3: Cross multiply
   748,598x = 1,590,638 × 1,590,638
4. Step 4: Simplify right side
   748,598x = 2,530,129,247,044
5. Step 5: Solve for x
   x = 2,530,129,247,044/748,598
6. Step 6: Final answer
   x = 3,379,823.68