Finding the Fourth Proportional to 1,809.05, 2,498.54 and 1,218.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,809.05 : 2,498.54 = 1,218.56 : x
2. Step 2: Convert to fraction form
   1,809.05/2,498.54 = 1,218.56/x
3. Step 3: Cross multiply
   1,809.05x = 2,498.54 × 1,218.56
4. Step 4: Simplify right side
   1,809.05x = 3,044,620.90
5. Step 5: Solve for x
   x = 3,044,620.90/1,809.05
6. Step 6: Final answer
   x = 1,682.99