Finding the Fourth Proportional to 12,479.10, 17,222.63 and 7,174.14

Step by Step Solution

1. Step 1: Write the proportion equation
   12,479.10 : 17,222.63 = 7,174.14 : x
2. Step 2: Convert to fraction form
   12,479.10/17,222.63 = 7,174.14/x
3. Step 3: Cross multiply
   12,479.10x = 17,222.63 × 7,174.14
4. Step 4: Simplify right side
   12,479.10x = 123,557,558.79
5. Step 5: Solve for x
   x = 123,557,558.79/12,479.10
6. Step 6: Final answer
   x = 9,901.16