Finding the Fourth Proportional to 11,228.81, 16,846.86 and 5,385.88

Step by Step Solution

1. Step 1: Write the proportion equation
   11,228.81 : 16,846.86 = 5,385.88 : x
2. Step 2: Convert to fraction form
   11,228.81/16,846.86 = 5,385.88/x
3. Step 3: Cross multiply
   11,228.81x = 16,846.86 × 5,385.88
4. Step 4: Simplify right side
   11,228.81x = 90,735,082.10
5. Step 5: Solve for x
   x = 90,735,082.10/11,228.81
6. Step 6: Final answer
   x = 8,080.56