Finding the Fourth Proportional to 2,188.18, 3,019.35 and 1,256.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.18 : 3,019.35 = 1,256.50 : x
2. Step 2: Convert to fraction form
   2,188.18/3,019.35 = 1,256.50/x
3. Step 3: Cross multiply
   2,188.18x = 3,019.35 × 1,256.50
4. Step 4: Simplify right side
   2,188.18x = 3,793,813.28
5. Step 5: Solve for x
   x = 3,793,813.28/2,188.18
6. Step 6: Final answer
   x = 1,733.78