Finding the Third Proportional to 748,840 and 1,615,780

Step by Step Solution

1. Step 1: Write the proportion equation
   748,840 : 1,615,780 = 1,615,780 : x
2. Step 2: Convert to fraction form
   748,840/1,615,780 = 1,615,780/x
3. Step 3: Cross multiply
   748,840x = 1,615,780 × 1,615,780
4. Step 4: Simplify right side
   748,840x = 2,610,745,008,400
5. Step 5: Solve for x
   x = 2,610,745,008,400/748,840
6. Step 6: Final answer
   x = 3,486,385.62