Finding the Fourth Proportional to 39,978.52, 59,968.06 and 13,683.48

Step by Step Solution

1. Step 1: Write the proportion equation
   39,978.52 : 59,968.06 = 13,683.48 : x
2. Step 2: Convert to fraction form
   39,978.52/59,968.06 = 13,683.48/x
3. Step 3: Cross multiply
   39,978.52x = 59,968.06 × 13,683.48
4. Step 4: Simplify right side
   39,978.52x = 820,571,749.65
5. Step 5: Solve for x
   x = 820,571,749.65/39,978.52
6. Step 6: Final answer
   x = 20,525.32