Finding the Fourth Proportional to 4,868.47, 6,715.56 and 3,072.79

Step by Step Solution

1. Step 1: Write the proportion equation
   4,868.47 : 6,715.56 = 3,072.79 : x
2. Step 2: Convert to fraction form
   4,868.47/6,715.56 = 3,072.79/x
3. Step 3: Cross multiply
   4,868.47x = 6,715.56 × 3,072.79
4. Step 4: Simplify right side
   4,868.47x = 20,635,505.61
5. Step 5: Solve for x
   x = 20,635,505.61/4,868.47
6. Step 6: Final answer
   x = 4,238.60