Finding the Third Proportional to 8,978,862 and 19,637,340

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978,862 : 19,637,340 = 19,637,340 : x
2. Step 2: Convert to fraction form
   8,978,862/19,637,340 = 19,637,340/x
3. Step 3: Cross multiply
   8,978,862x = 19,637,340 × 19,637,340
4. Step 4: Simplify right side
   8,978,862x = 385,625,122,275,600
5. Step 5: Solve for x
   x = 385,625,122,275,600/8,978,862
6. Step 6: Final answer
   x = 42,948,106.59