Finding the Third Proportional to 678,968 and 1,488,507

Step by Step Solution

1. Step 1: Write the proportion equation
   678,968 : 1,488,507 = 1,488,507 : x
2. Step 2: Convert to fraction form
   678,968/1,488,507 = 1,488,507/x
3. Step 3: Cross multiply
   678,968x = 1,488,507 × 1,488,507
4. Step 4: Simplify right side
   678,968x = 2,215,653,089,049
5. Step 5: Solve for x
   x = 2,215,653,089,049/678,968
6. Step 6: Final answer
   x = 3,263,265.85