Finding the Fourth Proportional to 5,129.33, 7,078.69 and 3,005.05

Step by Step Solution

1. Step 1: Write the proportion equation
   5,129.33 : 7,078.69 = 3,005.05 : x
2. Step 2: Convert to fraction form
   5,129.33/7,078.69 = 3,005.05/x
3. Step 3: Cross multiply
   5,129.33x = 7,078.69 × 3,005.05
4. Step 4: Simplify right side
   5,129.33x = 21,271,816.72
5. Step 5: Solve for x
   x = 21,271,816.72/5,129.33
6. Step 6: Final answer
   x = 4,147.10