Finding the Fourth Proportional to 11,783.52, 17,676.90 and 3,990.24

Step by Step Solution

1. Step 1: Write the proportion equation
   11,783.52 : 17,676.90 = 3,990.24 : x
2. Step 2: Convert to fraction form
   11,783.52/17,676.90 = 3,990.24/x
3. Step 3: Cross multiply
   11,783.52x = 17,676.90 × 3,990.24
4. Step 4: Simplify right side
   11,783.52x = 70,535,073.46
5. Step 5: Solve for x
   x = 70,535,073.46/11,783.52
6. Step 6: Final answer
   x = 5,985.91