Finding the Fourth Proportional to 2,188.73, 3,283.23 and 1,320.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.73 : 3,283.23 = 1,320.41 : x
2. Step 2: Convert to fraction form
   2,188.73/3,283.23 = 1,320.41/x
3. Step 3: Cross multiply
   2,188.73x = 3,283.23 × 1,320.41
4. Step 4: Simplify right side
   2,188.73x = 4,335,209.72
5. Step 5: Solve for x
   x = 4,335,209.72/2,188.73
6. Step 6: Final answer
   x = 1,980.70