Finding the Fourth Proportional to 12,628.02, 17,424.81 and 7,321.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,628.02 : 17,424.81 = 7,321.86 : x
2. Step 2: Convert to fraction form
   12,628.02/17,424.81 = 7,321.86/x
3. Step 3: Cross multiply
   12,628.02x = 17,424.81 × 7,321.86
4. Step 4: Simplify right side
   12,628.02x = 127,582,019.35
5. Step 5: Solve for x
   x = 127,582,019.35/12,628.02
6. Step 6: Final answer
   x = 10,103.09