Finding the Fourth Proportional to 5,238.78, 7,225.42 and 3,248.21

Step by Step Solution

1. Step 1: Write the proportion equation
   5,238.78 : 7,225.42 = 3,248.21 : x
2. Step 2: Convert to fraction form
   5,238.78/7,225.42 = 3,248.21/x
3. Step 3: Cross multiply
   5,238.78x = 7,225.42 × 3,248.21
4. Step 4: Simplify right side
   5,238.78x = 23,469,681.50
5. Step 5: Solve for x
   x = 23,469,681.50/5,238.78
6. Step 6: Final answer
   x = 4,479.99