Finding the Fourth Proportional to 11,990.52, 17,982.71 and 3,555.05

Step by Step Solution

1. Step 1: Write the proportion equation
   11,990.52 : 17,982.71 = 3,555.05 : x
2. Step 2: Convert to fraction form
   11,990.52/17,982.71 = 3,555.05/x
3. Step 3: Cross multiply
   11,990.52x = 17,982.71 × 3,555.05
4. Step 4: Simplify right side
   11,990.52x = 63,929,472.72
5. Step 5: Solve for x
   x = 63,929,472.72/11,990.52
6. Step 6: Final answer
   x = 5,331.67