Finding the Fourth Proportional to 12,480.21, 17,222.63 and 7,176.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,480.21 : 17,222.63 = 7,176.69 : x
2. Step 2: Convert to fraction form
   12,480.21/17,222.63 = 7,176.69/x
3. Step 3: Cross multiply
   12,480.21x = 17,222.63 × 7,176.69
4. Step 4: Simplify right side
   12,480.21x = 123,601,440.61
5. Step 5: Solve for x
   x = 123,601,440.61/12,480.21
6. Step 6: Final answer
   x = 9,903.79