Finding the Fourth Proportional to 5,078.34, 7,007.82 and 2,839.74

Step by Step Solution

1. Step 1: Write the proportion equation
   5,078.34 : 7,007.82 = 2,839.74 : x
2. Step 2: Convert to fraction form
   5,078.34/7,007.82 = 2,839.74/x
3. Step 3: Cross multiply
   5,078.34x = 7,007.82 × 2,839.74
4. Step 4: Simplify right side
   5,078.34x = 19,900,386.77
5. Step 5: Solve for x
   x = 19,900,386.77/5,078.34
6. Step 6: Final answer
   x = 3,918.68