Finding the Fourth Proportional to 3,850.47, 5,780.16 and 3,079.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,850.47 : 5,780.16 = 3,079.89 : x
2. Step 2: Convert to fraction form
   3,850.47/5,780.16 = 3,079.89/x
3. Step 3: Cross multiply
   3,850.47x = 5,780.16 × 3,079.89
4. Step 4: Simplify right side
   3,850.47x = 17,802,256.98
5. Step 5: Solve for x
   x = 17,802,256.98/3,850.47
6. Step 6: Final answer
   x = 4,623.40