Finding the Fourth Proportional to 12,986.53, 17,923.38 and 7,683.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,986.53 : 17,923.38 = 7,683.05 : x
2. Step 2: Convert to fraction form
   12,986.53/17,923.38 = 7,683.05/x
3. Step 3: Cross multiply
   12,986.53x = 17,923.38 × 7,683.05
4. Step 4: Simplify right side
   12,986.53x = 137,706,240.71
5. Step 5: Solve for x
   x = 137,706,240.71/12,986.53
6. Step 6: Final answer
   x = 10,603.78