Finding the Fourth Proportional to 4,680.05, 6,459.56 and 3,086.99

Step by Step Solution

1. Step 1: Write the proportion equation
   4,680.05 : 6,459.56 = 3,086.99 : x
2. Step 2: Convert to fraction form
   4,680.05/6,459.56 = 3,086.99/x
3. Step 3: Cross multiply
   4,680.05x = 6,459.56 × 3,086.99
4. Step 4: Simplify right side
   4,680.05x = 19,940,549.39
5. Step 5: Solve for x
   x = 19,940,549.39/4,680.05
6. Step 6: Final answer
   x = 4,260.76