Finding the Fourth Proportional to 4,780.33, 7,144.86 and 4,310.73

Step by Step Solution

1. Step 1: Write the proportion equation
   4,780.33 : 7,144.86 = 4,310.73 : x
2. Step 2: Convert to fraction form
   4,780.33/7,144.86 = 4,310.73/x
3. Step 3: Cross multiply
   4,780.33x = 7,144.86 × 4,310.73
4. Step 4: Simplify right side
   4,780.33x = 30,799,578.51
5. Step 5: Solve for x
   x = 30,799,578.51/4,780.33
6. Step 6: Final answer
   x = 6,442.99