Finding the Fourth Proportional to 4,809.78, 7,171.83 and 4,800.60

Step by Step Solution

1. Step 1: Write the proportion equation
   4,809.78 : 7,171.83 = 4,800.60 : x
2. Step 2: Convert to fraction form
   4,809.78/7,171.83 = 4,800.60/x
3. Step 3: Cross multiply
   4,809.78x = 7,171.83 × 4,800.60
4. Step 4: Simplify right side
   4,809.78x = 34,429,087.10
5. Step 5: Solve for x
   x = 34,429,087.10/4,809.78
6. Step 6: Final answer
   x = 7,158.14