Finding the Fourth Proportional to 1,804.15, 2,489.88 and 1,018.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,804.15 : 2,489.88 = 1,018.18 : x
2. Step 2: Convert to fraction form
   1,804.15/2,489.88 = 1,018.18/x
3. Step 3: Cross multiply
   1,804.15x = 2,489.88 × 1,018.18
4. Step 4: Simplify right side
   1,804.15x = 2,535,146.02
5. Step 5: Solve for x
   x = 2,535,146.02/1,804.15
6. Step 6: Final answer
   x = 1,405.17