Finding the Fourth Proportional to 11,971.78, 17,965.89 and 4,180.60

Step by Step Solution

1. Step 1: Write the proportion equation
   11,971.78 : 17,965.89 = 4,180.60 : x
2. Step 2: Convert to fraction form
   11,971.78/17,965.89 = 4,180.60/x
3. Step 3: Cross multiply
   11,971.78x = 17,965.89 × 4,180.60
4. Step 4: Simplify right side
   11,971.78x = 75,108,199.73
5. Step 5: Solve for x
   x = 75,108,199.73/11,971.78
6. Step 6: Final answer
   x = 6,273.77