Finding the Fourth Proportional to 1,815.17, 2,504.67 and 1,018.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,815.17 : 2,504.67 = 1,018.53 : x
2. Step 2: Convert to fraction form
   1,815.17/2,504.67 = 1,018.53/x
3. Step 3: Cross multiply
   1,815.17x = 2,504.67 × 1,018.53
4. Step 4: Simplify right side
   1,815.17x = 2,551,077.72
5. Step 5: Solve for x
   x = 2,551,077.72/1,815.17
6. Step 6: Final answer
   x = 1,405.42