Finding the Fourth Proportional to 39,683.59, 59,524.17 and 13,386.13

Step by Step Solution

1. Step 1: Write the proportion equation
   39,683.59 : 59,524.17 = 13,386.13 : x
2. Step 2: Convert to fraction form
   39,683.59/59,524.17 = 13,386.13/x
3. Step 3: Cross multiply
   39,683.59x = 59,524.17 × 13,386.13
4. Step 4: Simplify right side
   39,683.59x = 796,798,078.75
5. Step 5: Solve for x
   x = 796,798,078.75/39,683.59
6. Step 6: Final answer
   x = 20,078.78