Finding the Fourth Proportional to 1,815.59, 2,722.17 and 841.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,815.59 : 2,722.17 = 841.16 : x
2. Step 2: Convert to fraction form
   1,815.59/2,722.17 = 841.16/x
3. Step 3: Cross multiply
   1,815.59x = 2,722.17 × 841.16
4. Step 4: Simplify right side
   1,815.59x = 2,289,780.52
5. Step 5: Solve for x
   x = 2,289,780.52/1,815.59
6. Step 6: Final answer
   x = 1,261.18