Finding the Fourth Proportional to 4,788.33, 7,173.14 and 3,139.89

Step by Step Solution

1. Step 1: Write the proportion equation
   4,788.33 : 7,173.14 = 3,139.89 : x
2. Step 2: Convert to fraction form
   4,788.33/7,173.14 = 3,139.89/x
3. Step 3: Cross multiply
   4,788.33x = 7,173.14 × 3,139.89
4. Step 4: Simplify right side
   4,788.33x = 22,522,854.86
5. Step 5: Solve for x
   x = 22,522,854.86/4,788.33
6. Step 6: Final answer
   x = 4,703.70