Finding the Fourth Proportional to 10,991.34, 16,479.72 and 3,593.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,991.34 : 16,479.72 = 3,593.21 : x
2. Step 2: Convert to fraction form
   10,991.34/16,479.72 = 3,593.21/x
3. Step 3: Cross multiply
   10,991.34x = 16,479.72 × 3,593.21
4. Step 4: Simplify right side
   10,991.34x = 59,215,012.30
5. Step 5: Solve for x
   x = 59,215,012.30/10,991.34
6. Step 6: Final answer
   x = 5,387.42