Finding the Fourth Proportional to 10,991.43, 16,489.76 and 3,596.49

Step by Step Solution

1. Step 1: Write the proportion equation
   10,991.43 : 16,489.76 = 3,596.49 : x
2. Step 2: Convert to fraction form
   10,991.43/16,489.76 = 3,596.49/x
3. Step 3: Cross multiply
   10,991.43x = 16,489.76 × 3,596.49
4. Step 4: Simplify right side
   10,991.43x = 59,305,256.94
5. Step 5: Solve for x
   x = 59,305,256.94/10,991.43
6. Step 6: Final answer
   x = 5,395.59