Finding the Fourth Proportional to 11,218.10, 16,826.54 and 3,426.91

Step by Step Solution

1. Step 1: Write the proportion equation
   11,218.10 : 16,826.54 = 3,426.91 : x
2. Step 2: Convert to fraction form
   11,218.10/16,826.54 = 3,426.91/x
3. Step 3: Cross multiply
   11,218.10x = 16,826.54 × 3,426.91
4. Step 4: Simplify right side
   11,218.10x = 57,662,978.99
5. Step 5: Solve for x
   x = 57,662,978.99/11,218.10
6. Step 6: Final answer
   x = 5,140.18