Finding the Fourth Proportional to 12,443.61, 17,170.93 and 7,662.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,443.61 : 17,170.93 = 7,662.79 : x
2. Step 2: Convert to fraction form
   12,443.61/17,170.93 = 7,662.79/x
3. Step 3: Cross multiply
   12,443.61x = 17,170.93 × 7,662.79
4. Step 4: Simplify right side
   12,443.61x = 131,577,230.69
5. Step 5: Solve for x
   x = 131,577,230.69/12,443.61
6. Step 6: Final answer
   x = 10,573.88