Finding the Third Proportional to 7,881,416 and 16,978,640

Step by Step Solution

1. Step 1: Write the proportion equation
   7,881,416 : 16,978,640 = 16,978,640 : x
2. Step 2: Convert to fraction form
   7,881,416/16,978,640 = 16,978,640/x
3. Step 3: Cross multiply
   7,881,416x = 16,978,640 × 16,978,640
4. Step 4: Simplify right side
   7,881,416x = 288,274,216,249,600
5. Step 5: Solve for x
   x = 288,274,216,249,600/7,881,416
6. Step 6: Final answer
   x = 36,576,449.75