Finding the Fourth Proportional to 9,621.86, 13,287.33 and 9,097.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,621.86 : 13,287.33 = 9,097.69 : x
2. Step 2: Convert to fraction form
   9,621.86/13,287.33 = 9,097.69/x
3. Step 3: Cross multiply
   9,621.86x = 13,287.33 × 9,097.69
4. Step 4: Simplify right side
   9,621.86x = 120,884,025.88
5. Step 5: Solve for x
   x = 120,884,025.88/9,621.86
6. Step 6: Final answer
   x = 12,563.47