Finding the Fourth Proportional to 39,480.33, 59,223.59 and 13,185.16

Step by Step Solution

1. Step 1: Write the proportion equation
   39,480.33 : 59,223.59 = 13,185.16 : x
2. Step 2: Convert to fraction form
   39,480.33/59,223.59 = 13,185.16/x
3. Step 3: Cross multiply
   39,480.33x = 59,223.59 × 13,185.16
4. Step 4: Simplify right side
   39,480.33x = 780,872,542.89
5. Step 5: Solve for x
   x = 780,872,542.89/39,480.33
6. Step 6: Final answer
   x = 19,778.78