Finding the Third Proportional to 2,355 and 4,978

Step by Step Solution

1. Step 1: Write the proportion equation
   2,355 : 4,978 = 4,978 : x
2. Step 2: Convert to fraction form
   2,355/4,978 = 4,978/x
3. Step 3: Cross multiply
   2,355x = 4,978 × 4,978
4. Step 4: Simplify right side
   2,355x = 24,780,484
5. Step 5: Solve for x
   x = 24,780,484/2,355
6. Step 6: Final answer
   x = 10,522.50