Finding the Fourth Proportional to 11,978.98, 17,967.62 and 4,481.11

Step by Step Solution

1. Step 1: Write the proportion equation
   11,978.98 : 17,967.62 = 4,481.11 : x
2. Step 2: Convert to fraction form
   11,978.98/17,967.62 = 4,481.11/x
3. Step 3: Cross multiply
   11,978.98x = 17,967.62 × 4,481.11
4. Step 4: Simplify right side
   11,978.98x = 80,514,803.02
5. Step 5: Solve for x
   x = 80,514,803.02/11,978.98
6. Step 6: Final answer
   x = 6,721.34