Finding the Fourth Proportional to 43,429.51, 65,147.91 and 13,851.55

Step by Step Solution

1. Step 1: Write the proportion equation
   43,429.51 : 65,147.91 = 13,851.55 : x
2. Step 2: Convert to fraction form
   43,429.51/65,147.91 = 13,851.55/x
3. Step 3: Cross multiply
   43,429.51x = 65,147.91 × 13,851.55
4. Step 4: Simplify right side
   43,429.51x = 902,399,532.76
5. Step 5: Solve for x
   x = 902,399,532.76/43,429.51
6. Step 6: Final answer
   x = 20,778.49