Finding the Fourth Proportional to 41,689.48, 62,540.72 and 13,981

Step by Step Solution

1. Step 1: Write the proportion equation
   41,689.48 : 62,540.72 = 13,981 : x
2. Step 2: Convert to fraction form
   41,689.48/62,540.72 = 13,981/x
3. Step 3: Cross multiply
   41,689.48x = 62,540.72 × 13,981
4. Step 4: Simplify right side
   41,689.48x = 874,381,806.32
5. Step 5: Solve for x
   x = 874,381,806.32/41,689.48
6. Step 6: Final answer
   x = 20,973.68