Finding the Fourth Proportional to 1,856.27, 2,560.77 and 1,258.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,856.27 : 2,560.77 = 1,258.98 : x
2. Step 2: Convert to fraction form
   1,856.27/2,560.77 = 1,258.98/x
3. Step 3: Cross multiply
   1,856.27x = 2,560.77 × 1,258.98
4. Step 4: Simplify right side
   1,856.27x = 3,223,958.21
5. Step 5: Solve for x
   x = 3,223,958.21/1,856.27
6. Step 6: Final answer
   x = 1,736.80