Finding the Fourth Proportional to 9,508.49, 13,121.81 and 5,259.34

Step by Step Solution

1. Step 1: Write the proportion equation
   9,508.49 : 13,121.81 = 5,259.34 : x
2. Step 2: Convert to fraction form
   9,508.49/13,121.81 = 5,259.34/x
3. Step 3: Cross multiply
   9,508.49x = 13,121.81 × 5,259.34
4. Step 4: Simplify right side
   9,508.49x = 69,012,060.21
5. Step 5: Solve for x
   x = 69,012,060.21/9,508.49
6. Step 6: Final answer
   x = 7,257.94