Finding the Fourth Proportional to 4,178.72, 6,268.71 and 1,256.72

Step by Step Solution

1. Step 1: Write the proportion equation
   4,178.72 : 6,268.71 = 1,256.72 : x
2. Step 2: Convert to fraction form
   4,178.72/6,268.71 = 1,256.72/x
3. Step 3: Cross multiply
   4,178.72x = 6,268.71 × 1,256.72
4. Step 4: Simplify right side
   4,178.72x = 7,878,013.23
5. Step 5: Solve for x
   x = 7,878,013.23/4,178.72
6. Step 6: Final answer
   x = 1,885.27