Finding the Fourth Proportional to 10,991.72, 16,488.06 and 3,200.54

Step by Step Solution

1. Step 1: Write the proportion equation
   10,991.72 : 16,488.06 = 3,200.54 : x
2. Step 2: Convert to fraction form
   10,991.72/16,488.06 = 3,200.54/x
3. Step 3: Cross multiply
   10,991.72x = 16,488.06 × 3,200.54
4. Step 4: Simplify right side
   10,991.72x = 52,770,695.55
5. Step 5: Solve for x
   x = 52,770,695.55/10,991.72
6. Step 6: Final answer
   x = 4,800.95