Finding the Fourth Proportional to 39,960.48, 59,951.34 and 13,667.88

Step by Step Solution

1. Step 1: Write the proportion equation
   39,960.48 : 59,951.34 = 13,667.88 : x
2. Step 2: Convert to fraction form
   39,960.48/59,951.34 = 13,667.88/x
3. Step 3: Cross multiply
   39,960.48x = 59,951.34 × 13,667.88
4. Step 4: Simplify right side
   39,960.48x = 819,407,720.96
5. Step 5: Solve for x
   x = 819,407,720.96/39,960.48
6. Step 6: Final answer
   x = 20,505.45