Finding the Fourth Proportional to 11,097.87, 15,320.69 and 8,574.31

Step by Step Solution

1. Step 1: Write the proportion equation
   11,097.87 : 15,320.69 = 8,574.31 : x
2. Step 2: Convert to fraction form
   11,097.87/15,320.69 = 8,574.31/x
3. Step 3: Cross multiply
   11,097.87x = 15,320.69 × 8,574.31
4. Step 4: Simplify right side
   11,097.87x = 131,364,345.47
5. Step 5: Solve for x
   x = 131,364,345.47/11,097.87
6. Step 6: Final answer
   x = 11,836.90