Finding the Fourth Proportional to 2,036.50, 2,810.48 and 1,290.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,036.50 : 2,810.48 = 1,290.20 : x
2. Step 2: Convert to fraction form
   2,036.50/2,810.48 = 1,290.20/x
3. Step 3: Cross multiply
   2,036.50x = 2,810.48 × 1,290.20
4. Step 4: Simplify right side
   2,036.50x = 3,626,081.30
5. Step 5: Solve for x
   x = 3,626,081.30/2,036.50
6. Step 6: Final answer
   x = 1,780.55