Finding the Fourth Proportional to 39,981.72, 59,968.02 and 13,683

Step by Step Solution

1. Step 1: Write the proportion equation
   39,981.72 : 59,968.02 = 13,683 : x
2. Step 2: Convert to fraction form
   39,981.72/59,968.02 = 13,683/x
3. Step 3: Cross multiply
   39,981.72x = 59,968.02 × 13,683
4. Step 4: Simplify right side
   39,981.72x = 820,542,417.66
5. Step 5: Solve for x
   x = 820,542,417.66/39,981.72
6. Step 6: Final answer
   x = 20,522.94