Finding the Fourth Proportional to 2,081.50, 3,123.60 and 1,055.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.50 : 3,123.60 = 1,055.50 : x
2. Step 2: Convert to fraction form
   2,081.50/3,123.60 = 1,055.50/x
3. Step 3: Cross multiply
   2,081.50x = 3,123.60 × 1,055.50
4. Step 4: Simplify right side
   2,081.50x = 3,296,959.80
5. Step 5: Solve for x
   x = 3,296,959.80/2,081.50
6. Step 6: Final answer
   x = 1,583.93