Finding the Fourth Proportional to 13,016.28, 17,957.82 and 7,978.68

Step by Step Solution

1. Step 1: Write the proportion equation
   13,016.28 : 17,957.82 = 7,978.68 : x
2. Step 2: Convert to fraction form
   13,016.28/17,957.82 = 7,978.68/x
3. Step 3: Cross multiply
   13,016.28x = 17,957.82 × 7,978.68
4. Step 4: Simplify right side
   13,016.28x = 143,279,699.28
5. Step 5: Solve for x
   x = 143,279,699.28/13,016.28
6. Step 6: Final answer
   x = 11,007.73