Finding the Fourth Proportional to 12,485.75, 17,230.83 and 7,180.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,485.75 : 17,230.83 = 7,180.56 : x
2. Step 2: Convert to fraction form
   12,485.75/17,230.83 = 7,180.56/x
3. Step 3: Cross multiply
   12,485.75x = 17,230.83 × 7,180.56
4. Step 4: Simplify right side
   12,485.75x = 123,727,008.66
5. Step 5: Solve for x
   x = 123,727,008.66/12,485.75
6. Step 6: Final answer
   x = 9,909.46