Finding the Fourth Proportional to 2,188.91, 3,020.33 and 1,304.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.91 : 3,020.33 = 1,304.39 : x
2. Step 2: Convert to fraction form
   2,188.91/3,020.33 = 1,304.39/x
3. Step 3: Cross multiply
   2,188.91x = 3,020.33 × 1,304.39
4. Step 4: Simplify right side
   2,188.91x = 3,939,666.63
5. Step 5: Solve for x
   x = 3,939,666.63/2,188.91
6. Step 6: Final answer
   x = 1,799.83