Finding the Fourth Proportional to 2,081.30, 3,123.30 and 1,203.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.30 : 3,123.30 = 1,203.80 : x
2. Step 2: Convert to fraction form
   2,081.30/3,123.30 = 1,203.80/x
3. Step 3: Cross multiply
   2,081.30x = 3,123.30 × 1,203.80
4. Step 4: Simplify right side
   2,081.30x = 3,759,828.54
5. Step 5: Solve for x
   x = 3,759,828.54/2,081.30
6. Step 6: Final answer
   x = 1,806.48