Finding the Fourth Proportional to 1,819.55, 2,727.15 and 843.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,819.55 : 2,727.15 = 843.57 : x
2. Step 2: Convert to fraction form
   1,819.55/2,727.15 = 843.57/x
3. Step 3: Cross multiply
   1,819.55x = 2,727.15 × 843.57
4. Step 4: Simplify right side
   1,819.55x = 2,300,541.93
5. Step 5: Solve for x
   x = 2,300,541.93/1,819.55
6. Step 6: Final answer
   x = 1,264.35