Finding the Fourth Proportional to 2,189.59, 3,280.45 and 1,201.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.59 : 3,280.45 = 1,201.34 : x
2. Step 2: Convert to fraction form
   2,189.59/3,280.45 = 1,201.34/x
3. Step 3: Cross multiply
   2,189.59x = 3,280.45 × 1,201.34
4. Step 4: Simplify right side
   2,189.59x = 3,940,924.80
5. Step 5: Solve for x
   x = 3,940,924.80/2,189.59
6. Step 6: Final answer
   x = 1,799.85