Finding the Fourth Proportional to 9,480.87, 13,080.56 and 5,288.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,480.87 : 13,080.56 = 5,288.31 : x
2. Step 2: Convert to fraction form
   9,480.87/13,080.56 = 5,288.31/x
3. Step 3: Cross multiply
   9,480.87x = 13,080.56 × 5,288.31
4. Step 4: Simplify right side
   9,480.87x = 69,174,029.81
5. Step 5: Solve for x
   x = 69,174,029.81/9,480.87
6. Step 6: Final answer
   x = 7,296.17