Finding the Fourth Proportional to 1,815.10, 2,504.97 and 1,018.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,815.10 : 2,504.97 = 1,018.52 : x
2. Step 2: Convert to fraction form
   1,815.10/2,504.97 = 1,018.52/x
3. Step 3: Cross multiply
   1,815.10x = 2,504.97 × 1,018.52
4. Step 4: Simplify right side
   1,815.10x = 2,551,353.34
5. Step 5: Solve for x
   x = 2,551,353.34/1,815.10
6. Step 6: Final answer
   x = 1,405.63