Finding the Fourth Proportional to 1,854.83, 2,783.18 and 814.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,854.83 : 2,783.18 = 814.55 : x
2. Step 2: Convert to fraction form
   1,854.83/2,783.18 = 814.55/x
3. Step 3: Cross multiply
   1,854.83x = 2,783.18 × 814.55
4. Step 4: Simplify right side
   1,854.83x = 2,267,021.28
5. Step 5: Solve for x
   x = 2,267,021.28/1,854.83
6. Step 6: Final answer
   x = 1,222.23