Finding the Fourth Proportional to 1,826.20, 2,519.31 and 1,616.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,826.20 : 2,519.31 = 1,616.59 : x
2. Step 2: Convert to fraction form
   1,826.20/2,519.31 = 1,616.59/x
3. Step 3: Cross multiply
   1,826.20x = 2,519.31 × 1,616.59
4. Step 4: Simplify right side
   1,826.20x = 4,072,691.35
5. Step 5: Solve for x
   x = 4,072,691.35/1,826.20
6. Step 6: Final answer
   x = 2,230.15