Finding the Fourth Proportional to 4,877.19, 6,728.00 and 3,105.72

Step by Step Solution

1. Step 1: Write the proportion equation
   4,877.19 : 6,728.00 = 3,105.72 : x
2. Step 2: Convert to fraction form
   4,877.19/6,728.00 = 3,105.72/x
3. Step 3: Cross multiply
   4,877.19x = 6,728.00 × 3,105.72
4. Step 4: Simplify right side
   4,877.19x = 20,895,268.63
5. Step 5: Solve for x
   x = 20,895,268.63/4,877.19
6. Step 6: Final answer
   x = 4,284.28