Finding the Fourth Proportional to 2,172.22, 3,255.76 and 784.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172.22 : 3,255.76 = 784.82 : x
2. Step 2: Convert to fraction form
   2,172.22/3,255.76 = 784.82/x
3. Step 3: Cross multiply
   2,172.22x = 3,255.76 × 784.82
4. Step 4: Simplify right side
   2,172.22x = 2,555,183.60
5. Step 5: Solve for x
   x = 2,555,183.60/2,172.22
6. Step 6: Final answer
   x = 1,176.30