Finding the Third Proportional to 12,917,240 and 30,449,540

Step by Step Solution

1. Step 1: Write the proportion equation
   12,917,240 : 30,449,540 = 30,449,540 : x
2. Step 2: Convert to fraction form
   12,917,240/30,449,540 = 30,449,540/x
3. Step 3: Cross multiply
   12,917,240x = 30,449,540 × 30,449,540
4. Step 4: Simplify right side
   12,917,240x = 927,174,486,211,600
5. Step 5: Solve for x
   x = 927,174,486,211,600/12,917,240
6. Step 6: Final answer
   x = 71,778,064.53