Finding the Fourth Proportional to 17,978.38, 26,944.12 and 9,648.64

Step by Step Solution

1. Step 1: Write the proportion equation
   17,978.38 : 26,944.12 = 9,648.64 : x
2. Step 2: Convert to fraction form
   17,978.38/26,944.12 = 9,648.64/x
3. Step 3: Cross multiply
   17,978.38x = 26,944.12 × 9,648.64
4. Step 4: Simplify right side
   17,978.38x = 259,974,208.38
5. Step 5: Solve for x
   x = 259,974,208.38/17,978.38
6. Step 6: Final answer
   x = 14,460.38