Finding the Fourth Proportional to 4,688.91, 7,029.89 and 2,839.59

Step by Step Solution

1. Step 1: Write the proportion equation
   4,688.91 : 7,029.89 = 2,839.59 : x
2. Step 2: Convert to fraction form
   4,688.91/7,029.89 = 2,839.59/x
3. Step 3: Cross multiply
   4,688.91x = 7,029.89 × 2,839.59
4. Step 4: Simplify right side
   4,688.91x = 19,962,005.35
5. Step 5: Solve for x
   x = 19,962,005.35/4,688.91
6. Step 6: Final answer
   x = 4,257.28