Finding the Fourth Proportional to 39,749.58, 59,587.31 and 13,436.03

Step by Step Solution

1. Step 1: Write the proportion equation
   39,749.58 : 59,587.31 = 13,436.03 : x
2. Step 2: Convert to fraction form
   39,749.58/59,587.31 = 13,436.03/x
3. Step 3: Cross multiply
   39,749.58x = 59,587.31 × 13,436.03
4. Step 4: Simplify right side
   39,749.58x = 800,617,067.34
5. Step 5: Solve for x
   x = 800,617,067.34/39,749.58
6. Step 6: Final answer
   x = 20,141.52