Finding the Fourth Proportional to 2,015.31, 3,023.83 and 845.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.31 : 3,023.83 = 845.61 : x
2. Step 2: Convert to fraction form
   2,015.31/3,023.83 = 845.61/x
3. Step 3: Cross multiply
   2,015.31x = 3,023.83 × 845.61
4. Step 4: Simplify right side
   2,015.31x = 2,556,970.60
5. Step 5: Solve for x
   x = 2,556,970.60/2,015.31
6. Step 6: Final answer
   x = 1,268.77