Finding the Fourth Proportional to 2,989.89, 4,486.65 and 1,258.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,989.89 : 4,486.65 = 1,258.50 : x
2. Step 2: Convert to fraction form
   2,989.89/4,486.65 = 1,258.50/x
3. Step 3: Cross multiply
   2,989.89x = 4,486.65 × 1,258.50
4. Step 4: Simplify right side
   2,989.89x = 5,646,449.03
5. Step 5: Solve for x
   x = 5,646,449.03/2,989.89
6. Step 6: Final answer
   x = 1,888.51