Finding the Fourth Proportional to 39,613.50, 59,379.30 and 13,309.38

Step by Step Solution

1. Step 1: Write the proportion equation
   39,613.50 : 59,379.30 = 13,309.38 : x
2. Step 2: Convert to fraction form
   39,613.50/59,379.30 = 13,309.38/x
3. Step 3: Cross multiply
   39,613.50x = 59,379.30 × 13,309.38
4. Step 4: Simplify right side
   39,613.50x = 790,301,667.83
5. Step 5: Solve for x
   x = 790,301,667.83/39,613.50
6. Step 6: Final answer
   x = 19,950.31