Finding the Third Proportional to 4,978.13 and 10,371.38

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978.13 : 10,371.38 = 10,371.38 : x
2. Step 2: Convert to fraction form
   4,978.13/10,371.38 = 10,371.38/x
3. Step 3: Cross multiply
   4,978.13x = 10,371.38 × 10,371.38
4. Step 4: Simplify right side
   4,978.13x = 107,565,419.39
5. Step 5: Solve for x
   x = 107,565,419.39/4,978.13
6. Step 6: Final answer
   x = 21,607.62