Finding the Fourth Proportional to 2,189.78, 3,281.92 and 1,094.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.78 : 3,281.92 = 1,094.45 : x
2. Step 2: Convert to fraction form
   2,189.78/3,281.92 = 1,094.45/x
3. Step 3: Cross multiply
   2,189.78x = 3,281.92 × 1,094.45
4. Step 4: Simplify right side
   2,189.78x = 3,591,897.34
5. Step 5: Solve for x
   x = 3,591,897.34/2,189.78
6. Step 6: Final answer
   x = 1,640.30