Finding the Fourth Proportional to 12,685.38, 17,504.30 and 7,019.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,685.38 : 17,504.30 = 7,019.38 : x
2. Step 2: Convert to fraction form
   12,685.38/17,504.30 = 7,019.38/x
3. Step 3: Cross multiply
   12,685.38x = 17,504.30 × 7,019.38
4. Step 4: Simplify right side
   12,685.38x = 122,869,333.33
5. Step 5: Solve for x
   x = 122,869,333.33/12,685.38
6. Step 6: Final answer
   x = 9,685.90