Finding the Fourth Proportional to 11,778.73, 17,663.78 and 3,456.61

Step by Step Solution

1. Step 1: Write the proportion equation
   11,778.73 : 17,663.78 = 3,456.61 : x
2. Step 2: Convert to fraction form
   11,778.73/17,663.78 = 3,456.61/x
3. Step 3: Cross multiply
   11,778.73x = 17,663.78 × 3,456.61
4. Step 4: Simplify right side
   11,778.73x = 61,056,781.30
5. Step 5: Solve for x
   x = 61,056,781.30/11,778.73
6. Step 6: Final answer
   x = 5,183.65