Finding the Third Proportional to 7,881,374 and 16,978,556

Step by Step Solution

1. Step 1: Write the proportion equation
   7,881,374 : 16,978,556 = 16,978,556 : x
2. Step 2: Convert to fraction form
   7,881,374/16,978,556 = 16,978,556/x
3. Step 3: Cross multiply
   7,881,374x = 16,978,556 × 16,978,556
4. Step 4: Simplify right side
   7,881,374x = 288,271,363,845,136
5. Step 5: Solve for x
   x = 288,271,363,845,136/7,881,374
6. Step 6: Final answer
   x = 36,576,282.75