Finding the Fourth Proportional to 11,985.57, 17,964.23 and 5,404.05

Step by Step Solution

1. Step 1: Write the proportion equation
   11,985.57 : 17,964.23 = 5,404.05 : x
2. Step 2: Convert to fraction form
   11,985.57/17,964.23 = 5,404.05/x
3. Step 3: Cross multiply
   11,985.57x = 17,964.23 × 5,404.05
4. Step 4: Simplify right side
   11,985.57x = 97,079,597.13
5. Step 5: Solve for x
   x = 97,079,597.13/11,985.57
6. Step 6: Final answer
   x = 8,099.71