Finding the Fourth Proportional to 2,150.56, 3,226.38 and 852.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,150.56 : 3,226.38 = 852.40 : x
2. Step 2: Convert to fraction form
   2,150.56/3,226.38 = 852.40/x
3. Step 3: Cross multiply
   2,150.56x = 3,226.38 × 852.40
4. Step 4: Simplify right side
   2,150.56x = 2,750,166.31
5. Step 5: Solve for x
   x = 2,750,166.31/2,150.56
6. Step 6: Final answer
   x = 1,278.81