Finding the Third Proportional to 278,312 and 595,978

Step by Step Solution

1. Step 1: Write the proportion equation
   278,312 : 595,978 = 595,978 : x
2. Step 2: Convert to fraction form
   278,312/595,978 = 595,978/x
3. Step 3: Cross multiply
   278,312x = 595,978 × 595,978
4. Step 4: Simplify right side
   278,312x = 355,189,776,484
5. Step 5: Solve for x
   x = 355,189,776,484/278,312
6. Step 6: Final answer
   x = 1,276,228.75