Finding the Fourth Proportional to 12,480.45, 17,225.91 and 7,178.33

Step by Step Solution

1. Step 1: Write the proportion equation
   12,480.45 : 17,225.91 = 7,178.33 : x
2. Step 2: Convert to fraction form
   12,480.45/17,225.91 = 7,178.33/x
3. Step 3: Cross multiply
   12,480.45x = 17,225.91 × 7,178.33
4. Step 4: Simplify right side
   12,480.45x = 123,653,180.40
5. Step 5: Solve for x
   x = 123,653,180.40/12,480.45
6. Step 6: Final answer
   x = 9,907.75