Finding the Fourth Proportional to 11,986.04, 17,978.88 and 4,194.56

Step by Step Solution

1. Step 1: Write the proportion equation
   11,986.04 : 17,978.88 = 4,194.56 : x
2. Step 2: Convert to fraction form
   11,986.04/17,978.88 = 4,194.56/x
3. Step 3: Cross multiply
   11,986.04x = 17,978.88 × 4,194.56
4. Step 4: Simplify right side
   11,986.04x = 75,413,490.89
5. Step 5: Solve for x
   x = 75,413,490.89/11,986.04
6. Step 6: Final answer
   x = 6,291.78