Finding the Fourth Proportional to 12,784.76, 17,644.16 and 7,479.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,784.76 : 17,644.16 = 7,479.24 : x
2. Step 2: Convert to fraction form
   12,784.76/17,644.16 = 7,479.24/x
3. Step 3: Cross multiply
   12,784.76x = 17,644.16 × 7,479.24
4. Step 4: Simplify right side
   12,784.76x = 131,964,907.24
5. Step 5: Solve for x
   x = 131,964,907.24/12,784.76
6. Step 6: Final answer
   x = 10,322.05