Finding the Third Proportional to 13,509,871 and 19,907,470

Step by Step Solution

1. Step 1: Write the proportion equation
   13,509,871 : 19,907,470 = 19,907,470 : x
2. Step 2: Convert to fraction form
   13,509,871/19,907,470 = 19,907,470/x
3. Step 3: Cross multiply
   13,509,871x = 19,907,470 × 19,907,470
4. Step 4: Simplify right side
   13,509,871x = 396,307,361,800,900
5. Step 5: Solve for x
   x = 396,307,361,800,900/13,509,871
6. Step 6: Final answer
   x = 29,334,651.81