Finding the Fourth Proportional to 1,820.55, 2,723.94 and 1,115.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,820.55 : 2,723.94 = 1,115.25 : x
2. Step 2: Convert to fraction form
   1,820.55/2,723.94 = 1,115.25/x
3. Step 3: Cross multiply
   1,820.55x = 2,723.94 × 1,115.25
4. Step 4: Simplify right side
   1,820.55x = 3,037,874.09
5. Step 5: Solve for x
   x = 3,037,874.09/1,820.55
6. Step 6: Final answer
   x = 1,668.66