Finding the Fourth Proportional to 2,216.78, 3,055.80 and 1,823.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.78 : 3,055.80 = 1,823.12 : x
2. Step 2: Convert to fraction form
   2,216.78/3,055.80 = 1,823.12/x
3. Step 3: Cross multiply
   2,216.78x = 3,055.80 × 1,823.12
4. Step 4: Simplify right side
   2,216.78x = 5,571,090.10
5. Step 5: Solve for x
   x = 5,571,090.10/2,216.78
6. Step 6: Final answer
   x = 2,513.15