Finding the Fourth Proportional to 9,508.60, 13,120.72 and 5,259.08

Step by Step Solution

1. Step 1: Write the proportion equation
   9,508.60 : 13,120.72 = 5,259.08 : x
2. Step 2: Convert to fraction form
   9,508.60/13,120.72 = 5,259.08/x
3. Step 3: Cross multiply
   9,508.60x = 13,120.72 × 5,259.08
4. Step 4: Simplify right side
   9,508.60x = 69,002,916.14
5. Step 5: Solve for x
   x = 69,002,916.14/9,508.60
6. Step 6: Final answer
   x = 7,256.90