Finding the Third Proportional to 276,814,404 and 389,320,938

Step by Step Solution

1. Step 1: Write the proportion equation
   276,814,404 : 389,320,938 = 389,320,938 : x
2. Step 2: Convert to fraction form
   276,814,404/389,320,938 = 389,320,938/x
3. Step 3: Cross multiply
   276,814,404x = 389,320,938 × 389,320,938
4. Step 4: Simplify right side
   276,814,404x = 151,570,792,765,199,840
5. Step 5: Solve for x
   x = 151,570,792,765,199,840/276,814,404
6. Step 6: Final answer
   x = 547,553,850.43