Finding the Fourth Proportional to 1,815.42, 2,505.25 and 1,018.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,815.42 : 2,505.25 = 1,018.76 : x
2. Step 2: Convert to fraction form
   1,815.42/2,505.25 = 1,018.76/x
3. Step 3: Cross multiply
   1,815.42x = 2,505.25 × 1,018.76
4. Step 4: Simplify right side
   1,815.42x = 2,552,245.60
5. Step 5: Solve for x
   x = 2,552,245.60/1,815.42
6. Step 6: Final answer
   x = 1,405.87