Finding the Fourth Proportional to 41,720.82, 62,590.98 and 13,642.20

Step by Step Solution

1. Step 1: Write the proportion equation
   41,720.82 : 62,590.98 = 13,642.20 : x
2. Step 2: Convert to fraction form
   41,720.82/62,590.98 = 13,642.20/x
3. Step 3: Cross multiply
   41,720.82x = 62,590.98 × 13,642.20
4. Step 4: Simplify right side
   41,720.82x = 853,878,667.36
5. Step 5: Solve for x
   x = 853,878,667.36/41,720.82
6. Step 6: Final answer
   x = 20,466.49