Finding the Fourth Proportional to 1,815.78, 2,724.72 and 841.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,815.78 : 2,724.72 = 841.83 : x
2. Step 2: Convert to fraction form
   1,815.78/2,724.72 = 841.83/x
3. Step 3: Cross multiply
   1,815.78x = 2,724.72 × 841.83
4. Step 4: Simplify right side
   1,815.78x = 2,293,751.04
5. Step 5: Solve for x
   x = 2,293,751.04/1,815.78
6. Step 6: Final answer
   x = 1,263.23