Finding the Fourth Proportional to 39,758.34, 59,644.82 and 13,105.91

Step by Step Solution

1. Step 1: Write the proportion equation
   39,758.34 : 59,644.82 = 13,105.91 : x
2. Step 2: Convert to fraction form
   39,758.34/59,644.82 = 13,105.91/x
3. Step 3: Cross multiply
   39,758.34x = 59,644.82 × 13,105.91
4. Step 4: Simplify right side
   39,758.34x = 781,699,642.89
5. Step 5: Solve for x
   x = 781,699,642.89/39,758.34
6. Step 6: Final answer
   x = 19,661.27