Finding the Fourth Proportional to 12,806.72, 17,666.16 and 7,500.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,806.72 : 17,666.16 = 7,500.50 : x
2. Step 2: Convert to fraction form
   12,806.72/17,666.16 = 7,500.50/x
3. Step 3: Cross multiply
   12,806.72x = 17,666.16 × 7,500.50
4. Step 4: Simplify right side
   12,806.72x = 132,505,033.08
5. Step 5: Solve for x
   x = 132,505,033.08/12,806.72
6. Step 6: Final answer
   x = 10,346.52