Finding the Fourth Proportional to 2,152.68, 3,225.78 and 1,055.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.68 : 3,225.78 = 1,055.72 : x
2. Step 2: Convert to fraction form
   2,152.68/3,225.78 = 1,055.72/x
3. Step 3: Cross multiply
   2,152.68x = 3,225.78 × 1,055.72
4. Step 4: Simplify right side
   2,152.68x = 3,405,504.33
5. Step 5: Solve for x
   x = 3,405,504.33/2,152.68
6. Step 6: Final answer
   x = 1,581.98