Finding the Fourth Proportional to 11,778.68, 17,665.98 and 3,458.54

Step by Step Solution

1. Step 1: Write the proportion equation
   11,778.68 : 17,665.98 = 3,458.54 : x
2. Step 2: Convert to fraction form
   11,778.68/17,665.98 = 3,458.54/x
3. Step 3: Cross multiply
   11,778.68x = 17,665.98 × 3,458.54
4. Step 4: Simplify right side
   11,778.68x = 61,098,498.47
5. Step 5: Solve for x
   x = 61,098,498.47/11,778.68
6. Step 6: Final answer
   x = 5,187.21