Finding the Fourth Proportional to 1,809.23, 2,715.38 and 1,290.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,809.23 : 2,715.38 = 1,290.50 : x
2. Step 2: Convert to fraction form
   1,809.23/2,715.38 = 1,290.50/x
3. Step 3: Cross multiply
   1,809.23x = 2,715.38 × 1,290.50
4. Step 4: Simplify right side
   1,809.23x = 3,504,197.89
5. Step 5: Solve for x
   x = 3,504,197.89/1,809.23
6. Step 6: Final answer
   x = 1,936.84