Finding the Fourth Proportional to 4,785.76, 7,171.31 and 3,219.96

Step by Step Solution

1. Step 1: Write the proportion equation
   4,785.76 : 7,171.31 = 3,219.96 : x
2. Step 2: Convert to fraction form
   4,785.76/7,171.31 = 3,219.96/x
3. Step 3: Cross multiply
   4,785.76x = 7,171.31 × 3,219.96
4. Step 4: Simplify right side
   4,785.76x = 23,091,340.31
5. Step 5: Solve for x
   x = 23,091,340.31/4,785.76
6. Step 6: Final answer
   x = 4,825.01