Finding the Fourth Proportional to 5,109.30, 7,050.75 and 2,840.55

Step by Step Solution

1. Step 1: Write the proportion equation
   5,109.30 : 7,050.75 = 2,840.55 : x
2. Step 2: Convert to fraction form
   5,109.30/7,050.75 = 2,840.55/x
3. Step 3: Cross multiply
   5,109.30x = 7,050.75 × 2,840.55
4. Step 4: Simplify right side
   5,109.30x = 20,028,007.91
5. Step 5: Solve for x
   x = 20,028,007.91/5,109.30
6. Step 6: Final answer
   x = 3,919.91