Finding the Fourth Proportional to 12,661.28, 17,470.32 and 7,624.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,661.28 : 17,470.32 = 7,624.16 : x
2. Step 2: Convert to fraction form
   12,661.28/17,470.32 = 7,624.16/x
3. Step 3: Cross multiply
   12,661.28x = 17,470.32 × 7,624.16
4. Step 4: Simplify right side
   12,661.28x = 133,196,514.93
5. Step 5: Solve for x
   x = 133,196,514.93/12,661.28
6. Step 6: Final answer
   x = 10,519.99