Finding the Third Proportional to 129,362.75 and 278,398

Step by Step Solution

1. Step 1: Write the proportion equation
   129,362.75 : 278,398 = 278,398 : x
2. Step 2: Convert to fraction form
   129,362.75/278,398 = 278,398/x
3. Step 3: Cross multiply
   129,362.75x = 278,398 × 278,398
4. Step 4: Simplify right side
   129,362.75x = 77,505,446,404
5. Step 5: Solve for x
   x = 77,505,446,404/129,362.75
6. Step 6: Final answer
   x = 599,132.64