Finding the Fourth Proportional to 11,665.55, 17,493.20 and 4,268.09

Step by Step Solution

1. Step 1: Write the proportion equation
   11,665.55 : 17,493.20 = 4,268.09 : x
2. Step 2: Convert to fraction form
   11,665.55/17,493.20 = 4,268.09/x
3. Step 3: Cross multiply
   11,665.55x = 17,493.20 × 4,268.09
4. Step 4: Simplify right side
   11,665.55x = 74,662,530.65
5. Step 5: Solve for x
   x = 74,662,530.65/11,665.55
6. Step 6: Final answer
   x = 6,400.26