Finding the Fourth Proportional to 12,952.05, 17,873.86 and 7,647.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,952.05 : 17,873.86 = 7,647.21 : x
2. Step 2: Convert to fraction form
   12,952.05/17,873.86 = 7,647.21/x
3. Step 3: Cross multiply
   12,952.05x = 17,873.86 × 7,647.21
4. Step 4: Simplify right side
   12,952.05x = 136,685,033.33
5. Step 5: Solve for x
   x = 136,685,033.33/12,952.05
6. Step 6: Final answer
   x = 10,553.16