Finding the Fourth Proportional to 2,015.43, 3,021.00 and 845.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.43 : 3,021.00 = 845.13 : x
2. Step 2: Convert to fraction form
   2,015.43/3,021.00 = 845.13/x
3. Step 3: Cross multiply
   2,015.43x = 3,021.00 × 845.13
4. Step 4: Simplify right side
   2,015.43x = 2,553,145.89
5. Step 5: Solve for x
   x = 2,553,145.89/2,015.43
6. Step 6: Final answer
   x = 1,266.80