Finding the Fourth Proportional to 12,485.67, 17,230.10 and 7,180.35

Step by Step Solution

1. Step 1: Write the proportion equation
   12,485.67 : 17,230.10 = 7,180.35 : x
2. Step 2: Convert to fraction form
   12,485.67/17,230.10 = 7,180.35/x
3. Step 3: Cross multiply
   12,485.67x = 17,230.10 × 7,180.35
4. Step 4: Simplify right side
   12,485.67x = 123,718,112.63
5. Step 5: Solve for x
   x = 123,718,112.63/12,485.67
6. Step 6: Final answer
   x = 9,908.81