Finding the Fourth Proportional to 2,015.50, 3,024.42 and 845.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.50 : 3,024.42 = 845.40 : x
2. Step 2: Convert to fraction form
   2,015.50/3,024.42 = 845.40/x
3. Step 3: Cross multiply
   2,015.50x = 3,024.42 × 845.40
4. Step 4: Simplify right side
   2,015.50x = 2,556,844.67
5. Step 5: Solve for x
   x = 2,556,844.67/2,015.50
6. Step 6: Final answer
   x = 1,268.59