Finding the Fourth Proportional to 1,346.55, 1,858.46 and 1,258.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,346.55 : 1,858.46 = 1,258.71 : x
2. Step 2: Convert to fraction form
   1,346.55/1,858.46 = 1,258.71/x
3. Step 3: Cross multiply
   1,346.55x = 1,858.46 × 1,258.71
4. Step 4: Simplify right side
   1,346.55x = 2,339,255.89
5. Step 5: Solve for x
   x = 2,339,255.89/1,346.55
6. Step 6: Final answer
   x = 1,737.22