Finding the Third Proportional to 8,138,354 and 12,590,074

Step by Step Solution

1. Step 1: Write the proportion equation
   8,138,354 : 12,590,074 = 12,590,074 : x
2. Step 2: Convert to fraction form
   8,138,354/12,590,074 = 12,590,074/x
3. Step 3: Cross multiply
   8,138,354x = 12,590,074 × 12,590,074
4. Step 4: Simplify right side
   8,138,354x = 158,509,963,325,476
5. Step 5: Solve for x
   x = 158,509,963,325,476/8,138,354
6. Step 6: Final answer
   x = 19,476,906.92