Finding the Fourth Proportional to 7,978.82, 11,969.78 and 3,301.38

Step by Step Solution

1. Step 1: Write the proportion equation
   7,978.82 : 11,969.78 = 3,301.38 : x
2. Step 2: Convert to fraction form
   7,978.82/11,969.78 = 3,301.38/x
3. Step 3: Cross multiply
   7,978.82x = 11,969.78 × 3,301.38
4. Step 4: Simplify right side
   7,978.82x = 39,516,775.79
5. Step 5: Solve for x
   x = 39,516,775.79/7,978.82
6. Step 6: Final answer
   x = 4,952.71