Finding the Fourth Proportional to 1,801.31, 2,485.82 and 1,015.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,801.31 : 2,485.82 = 1,015.39 : x
2. Step 2: Convert to fraction form
   1,801.31/2,485.82 = 1,015.39/x
3. Step 3: Cross multiply
   1,801.31x = 2,485.82 × 1,015.39
4. Step 4: Simplify right side
   1,801.31x = 2,524,065.48
5. Step 5: Solve for x
   x = 2,524,065.48/1,801.31
6. Step 6: Final answer
   x = 1,401.24