Finding the Fourth Proportional to 12,676.32, 17,494.79 and 7,643.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,676.32 : 17,494.79 = 7,643.12 : x
2. Step 2: Convert to fraction form
   12,676.32/17,494.79 = 7,643.12/x
3. Step 3: Cross multiply
   12,676.32x = 17,494.79 × 7,643.12
4. Step 4: Simplify right side
   12,676.32x = 133,714,754.72
5. Step 5: Solve for x
   x = 133,714,754.72/12,676.32
6. Step 6: Final answer
   x = 10,548.39