Finding the Fourth Proportional to 1,801.38, 2,485.86 and 1,015.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,801.38 : 2,485.86 = 1,015.42 : x
2. Step 2: Convert to fraction form
   1,801.38/2,485.86 = 1,015.42/x
3. Step 3: Cross multiply
   1,801.38x = 2,485.86 × 1,015.42
4. Step 4: Simplify right side
   1,801.38x = 2,524,191.96
5. Step 5: Solve for x
   x = 2,524,191.96/1,801.38
6. Step 6: Final answer
   x = 1,401.25