Finding the Fourth Proportional to 5,238.06, 7,228.89 and 2,880.22

Step by Step Solution

1. Step 1: Write the proportion equation
   5,238.06 : 7,228.89 = 2,880.22 : x
2. Step 2: Convert to fraction form
   5,238.06/7,228.89 = 2,880.22/x
3. Step 3: Cross multiply
   5,238.06x = 7,228.89 × 2,880.22
4. Step 4: Simplify right side
   5,238.06x = 20,820,793.56
5. Step 5: Solve for x
   x = 20,820,793.56/5,238.06
6. Step 6: Final answer
   x = 3,974.91