Finding the Fourth Proportional to 10,991.10, 16,475.85 and 5,445.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,991.10 : 16,475.85 = 5,445.30 : x
2. Step 2: Convert to fraction form
   10,991.10/16,475.85 = 5,445.30/x
3. Step 3: Cross multiply
   10,991.10x = 16,475.85 × 5,445.30
4. Step 4: Simplify right side
   10,991.10x = 89,715,946.01
5. Step 5: Solve for x
   x = 89,715,946.01/10,991.10
6. Step 6: Final answer
   x = 8,162.60