Finding the Fourth Proportional to 12,798.69, 17,662.79 and 7,495.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,798.69 : 17,662.79 = 7,495.21 : x
2. Step 2: Convert to fraction form
   12,798.69/17,662.79 = 7,495.21/x
3. Step 3: Cross multiply
   12,798.69x = 17,662.79 × 7,495.21
4. Step 4: Simplify right side
   12,798.69x = 132,386,320.24
5. Step 5: Solve for x
   x = 132,386,320.24/12,798.69
6. Step 6: Final answer
   x = 10,343.74