Finding the Fourth Proportional to 1,256.94, 1,870.56 and 1,216.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,256.94 : 1,870.56 = 1,216.44 : x
2. Step 2: Convert to fraction form
   1,256.94/1,870.56 = 1,216.44/x
3. Step 3: Cross multiply
   1,256.94x = 1,870.56 × 1,216.44
4. Step 4: Simplify right side
   1,256.94x = 2,275,424.01
5. Step 5: Solve for x
   x = 2,275,424.01/1,256.94
6. Step 6: Final answer
   x = 1,810.29