Finding the Fourth Proportional to 2,189.56, 3,021.51 and 1,258

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.56 : 3,021.51 = 1,258 : x
2. Step 2: Convert to fraction form
   2,189.56/3,021.51 = 1,258/x
3. Step 3: Cross multiply
   2,189.56x = 3,021.51 × 1,258
4. Step 4: Simplify right side
   2,189.56x = 3,801,059.58
5. Step 5: Solve for x
   x = 3,801,059.58/2,189.56
6. Step 6: Final answer
   x = 1,735.99