Finding the Fourth Proportional to 10,990.56, 16,488 and 3,593.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,990.56 : 16,488 = 3,593.76 : x
2. Step 2: Convert to fraction form
   10,990.56/16,488 = 3,593.76/x
3. Step 3: Cross multiply
   10,990.56x = 16,488 × 3,593.76
4. Step 4: Simplify right side
   10,990.56x = 59,253,914.88
5. Step 5: Solve for x
   x = 59,253,914.88/10,990.56
6. Step 6: Final answer
   x = 5,391.35