Finding the Third Proportional to 861,728 and 1,851,392

Step by Step Solution

1. Step 1: Write the proportion equation
   861,728 : 1,851,392 = 1,851,392 : x
2. Step 2: Convert to fraction form
   861,728/1,851,392 = 1,851,392/x
3. Step 3: Cross multiply
   861,728x = 1,851,392 × 1,851,392
4. Step 4: Simplify right side
   861,728x = 3,427,652,337,664
5. Step 5: Solve for x
   x = 3,427,652,337,664/861,728
6. Step 6: Final answer
   x = 3,977,649.95