Finding the Fourth Proportional to 2,189.12, 3,283.76 and 889.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.12 : 3,283.76 = 889.72 : x
2. Step 2: Convert to fraction form
   2,189.12/3,283.76 = 889.72/x
3. Step 3: Cross multiply
   2,189.12x = 3,283.76 × 889.72
4. Step 4: Simplify right side
   2,189.12x = 2,921,626.95
5. Step 5: Solve for x
   x = 2,921,626.95/2,189.12
6. Step 6: Final answer
   x = 1,334.61