Finding the Fourth Proportional to 2,188.38, 3,020.32 and 1,304.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.38 : 3,020.32 = 1,304.70 : x
2. Step 2: Convert to fraction form
   2,188.38/3,020.32 = 1,304.70/x
3. Step 3: Cross multiply
   2,188.38x = 3,020.32 × 1,304.70
4. Step 4: Simplify right side
   2,188.38x = 3,940,611.50
5. Step 5: Solve for x
   x = 3,940,611.50/2,188.38
6. Step 6: Final answer
   x = 1,800.70