Finding the Fourth Proportional to 39,815.82, 59,729.22 and 13,513.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,815.82 : 59,729.22 = 13,513.50 : x
2. Step 2: Convert to fraction form
   39,815.82/59,729.22 = 13,513.50/x
3. Step 3: Cross multiply
   39,815.82x = 59,729.22 × 13,513.50
4. Step 4: Simplify right side
   39,815.82x = 807,150,814.47
5. Step 5: Solve for x
   x = 807,150,814.47/39,815.82
6. Step 6: Final answer
   x = 20,272.11