Finding the Third Proportional to 2,978.25 and 4,359

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.25 : 4,359 = 4,359 : x
2. Step 2: Convert to fraction form
   2,978.25/4,359 = 4,359/x
3. Step 3: Cross multiply
   2,978.25x = 4,359 × 4,359
4. Step 4: Simplify right side
   2,978.25x = 19,000,881
5. Step 5: Solve for x
   x = 19,000,881/2,978.25
6. Step 6: Final answer
   x = 6,379.88