Finding the Fourth Proportional to 2,188.82, 3,019.88 and 1,304.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.82 : 3,019.88 = 1,304.91 : x
2. Step 2: Convert to fraction form
   2,188.82/3,019.88 = 1,304.91/x
3. Step 3: Cross multiply
   2,188.82x = 3,019.88 × 1,304.91
4. Step 4: Simplify right side
   2,188.82x = 3,940,674.87
5. Step 5: Solve for x
   x = 3,940,674.87/2,188.82
6. Step 6: Final answer
   x = 1,800.36