Finding the Third Proportional to 678,972 and 1,488,516

Step by Step Solution

1. Step 1: Write the proportion equation
   678,972 : 1,488,516 = 1,488,516 : x
2. Step 2: Convert to fraction form
   678,972/1,488,516 = 1,488,516/x
3. Step 3: Cross multiply
   678,972x = 1,488,516 × 1,488,516
4. Step 4: Simplify right side
   678,972x = 2,215,679,882,256
5. Step 5: Solve for x
   x = 2,215,679,882,256/678,972
6. Step 6: Final answer
   x = 3,263,286.09