Finding the Third Proportional to 7,978 and 17,558

Step by Step Solution

1. Step 1: Write the proportion equation
   7,978 : 17,558 = 17,558 : x
2. Step 2: Convert to fraction form
   7,978/17,558 = 17,558/x
3. Step 3: Cross multiply
   7,978x = 17,558 × 17,558
4. Step 4: Simplify right side
   7,978x = 308,283,364
5. Step 5: Solve for x
   x = 308,283,364/7,978
6. Step 6: Final answer
   x = 38,641.69