Finding the Fourth Proportional to 3,012.56, 4,515.74 and 1,258.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,012.56 : 4,515.74 = 1,258.59 : x
2. Step 2: Convert to fraction form
   3,012.56/4,515.74 = 1,258.59/x
3. Step 3: Cross multiply
   3,012.56x = 4,515.74 × 1,258.59
4. Step 4: Simplify right side
   3,012.56x = 5,683,451.63
5. Step 5: Solve for x
   x = 5,683,451.63/3,012.56
6. Step 6: Final answer
   x = 1,886.59