Finding the Third Proportional to 17,978 and 26,379

Step by Step Solution

1. Step 1: Write the proportion equation
   17,978 : 26,379 = 26,379 : x
2. Step 2: Convert to fraction form
   17,978/26,379 = 26,379/x
3. Step 3: Cross multiply
   17,978x = 26,379 × 26,379
4. Step 4: Simplify right side
   17,978x = 695,851,641
5. Step 5: Solve for x
   x = 695,851,641/17,978
6. Step 6: Final answer
   x = 38,705.73