Finding the Fourth Proportional to 12,479.60, 17,223.32 and 7,174.64

Step by Step Solution

1. Step 1: Write the proportion equation
   12,479.60 : 17,223.32 = 7,174.64 : x
2. Step 2: Convert to fraction form
   12,479.60/17,223.32 = 7,174.64/x
3. Step 3: Cross multiply
   12,479.60x = 17,223.32 × 7,174.64
4. Step 4: Simplify right side
   12,479.60x = 123,571,120.60
5. Step 5: Solve for x
   x = 123,571,120.60/12,479.60
6. Step 6: Final answer
   x = 9,901.85