Finding the Fourth Proportional to 2,188.06, 3,019.17 and 1,256.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.06 : 3,019.17 = 1,256.38 : x
2. Step 2: Convert to fraction form
   2,188.06/3,019.17 = 1,256.38/x
3. Step 3: Cross multiply
   2,188.06x = 3,019.17 × 1,256.38
4. Step 4: Simplify right side
   2,188.06x = 3,793,224.80
5. Step 5: Solve for x
   x = 3,793,224.80/2,188.06
6. Step 6: Final answer
   x = 1,733.60