Finding the Fourth Proportional to 4,708.17, 7,061.78 and 2,858.78

Step by Step Solution

1. Step 1: Write the proportion equation
   4,708.17 : 7,061.78 = 2,858.78 : x
2. Step 2: Convert to fraction form
   4,708.17/7,061.78 = 2,858.78/x
3. Step 3: Cross multiply
   4,708.17x = 7,061.78 × 2,858.78
4. Step 4: Simplify right side
   4,708.17x = 20,188,025.83
5. Step 5: Solve for x
   x = 20,188,025.83/4,708.17
6. Step 6: Final answer
   x = 4,287.87