Finding the Fourth Proportional to 2,188.71, 3,020.81 and 1,304.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.71 : 3,020.81 = 1,304.82 : x
2. Step 2: Convert to fraction form
   2,188.71/3,020.81 = 1,304.82/x
3. Step 3: Cross multiply
   2,188.71x = 3,020.81 × 1,304.82
4. Step 4: Simplify right side
   2,188.71x = 3,941,606.78
5. Step 5: Solve for x
   x = 3,941,606.78/2,188.71
6. Step 6: Final answer
   x = 1,800.88