Finding the Fourth Proportional to 12,706.02, 17,528.55 and 7,668.63

Step by Step Solution

1. Step 1: Write the proportion equation
   12,706.02 : 17,528.55 = 7,668.63 : x
2. Step 2: Convert to fraction form
   12,706.02/17,528.55 = 7,668.63/x
3. Step 3: Cross multiply
   12,706.02x = 17,528.55 × 7,668.63
4. Step 4: Simplify right side
   12,706.02x = 134,419,949.32
5. Step 5: Solve for x
   x = 134,419,949.32/12,706.02
6. Step 6: Final answer
   x = 10,579.24