Finding the Fourth Proportional to 12,479.06, 17,221.11 and 7,175.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,479.06 : 17,221.11 = 7,175.59 : x
2. Step 2: Convert to fraction form
   12,479.06/17,221.11 = 7,175.59/x
3. Step 3: Cross multiply
   12,479.06x = 17,221.11 × 7,175.59
4. Step 4: Simplify right side
   12,479.06x = 123,571,554.74
5. Step 5: Solve for x
   x = 123,571,554.74/12,479.06
6. Step 6: Final answer
   x = 9,902.31