Finding the Third Proportional to 2,578,377 and 5,615,520

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578,377 : 5,615,520 = 5,615,520 : x
2. Step 2: Convert to fraction form
   2,578,377/5,615,520 = 5,615,520/x
3. Step 3: Cross multiply
   2,578,377x = 5,615,520 × 5,615,520
4. Step 4: Simplify right side
   2,578,377x = 31,534,064,870,400
5. Step 5: Solve for x
   x = 31,534,064,870,400/2,578,377
6. Step 6: Final answer
   x = 12,230,199.41