Finding the Fourth Proportional to 9,508.18, 13,121.31 and 5,259.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,508.18 : 13,121.31 = 5,259.55 : x
2. Step 2: Convert to fraction form
   9,508.18/13,121.31 = 5,259.55/x
3. Step 3: Cross multiply
   9,508.18x = 13,121.31 × 5,259.55
4. Step 4: Simplify right side
   9,508.18x = 69,012,186.01
5. Step 5: Solve for x
   x = 69,012,186.01/9,508.18
6. Step 6: Final answer
   x = 7,258.19