Finding the Fourth Proportional to 12,910.69, 17,816.75 and 7,321.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,910.69 : 17,816.75 = 7,321.69 : x
2. Step 2: Convert to fraction form
   12,910.69/17,816.75 = 7,321.69/x
3. Step 3: Cross multiply
   12,910.69x = 17,816.75 × 7,321.69
4. Step 4: Simplify right side
   12,910.69x = 130,448,694.07
5. Step 5: Solve for x
   x = 130,448,694.07/12,910.69
6. Step 6: Final answer
   x = 10,103.93