Finding the Third Proportional to 7,881,290 and 16,978,388

Step by Step Solution

1. Step 1: Write the proportion equation
   7,881,290 : 16,978,388 = 16,978,388 : x
2. Step 2: Convert to fraction form
   7,881,290/16,978,388 = 16,978,388/x
3. Step 3: Cross multiply
   7,881,290x = 16,978,388 × 16,978,388
4. Step 4: Simplify right side
   7,881,290x = 288,265,659,078,544
5. Step 5: Solve for x
   x = 288,265,659,078,544/7,881,290
6. Step 6: Final answer
   x = 36,575,948.74