Finding the Fourth Proportional to 1,804.42, 2,490.20 and 1,018.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,804.42 : 2,490.20 = 1,018.32 : x
2. Step 2: Convert to fraction form
   1,804.42/2,490.20 = 1,018.32/x
3. Step 3: Cross multiply
   1,804.42x = 2,490.20 × 1,018.32
4. Step 4: Simplify right side
   1,804.42x = 2,535,820.46
5. Step 5: Solve for x
   x = 2,535,820.46/1,804.42
6. Step 6: Final answer
   x = 1,405.34