Finding the Fourth Proportional to 2,187.52, 3,018.78 and 1,256

Step by Step Solution

1. Step 1: Write the proportion equation
   2,187.52 : 3,018.78 = 1,256 : x
2. Step 2: Convert to fraction form
   2,187.52/3,018.78 = 1,256/x
3. Step 3: Cross multiply
   2,187.52x = 3,018.78 × 1,256
4. Step 4: Simplify right side
   2,187.52x = 3,791,587.68
5. Step 5: Solve for x
   x = 3,791,587.68/2,187.52
6. Step 6: Final answer
   x = 1,733.28