Finding the Fourth Proportional to 2,820.32, 4,231.20 and 845.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,820.32 : 4,231.20 = 845.94 : x
2. Step 2: Convert to fraction form
   2,820.32/4,231.20 = 845.94/x
3. Step 3: Cross multiply
   2,820.32x = 4,231.20 × 845.94
4. Step 4: Simplify right side
   2,820.32x = 3,579,337.10
5. Step 5: Solve for x
   x = 3,579,337.10/2,820.32
6. Step 6: Final answer
   x = 1,269.13