Finding the Fourth Proportional to 2,188.27, 3,019.81 and 1,256.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.27 : 3,019.81 = 1,256.77 : x
2. Step 2: Convert to fraction form
   2,188.27/3,019.81 = 1,256.77/x
3. Step 3: Cross multiply
   2,188.27x = 3,019.81 × 1,256.77
4. Step 4: Simplify right side
   2,188.27x = 3,795,189.08
5. Step 5: Solve for x
   x = 3,795,189.08/2,188.27
6. Step 6: Final answer
   x = 1,734.34