Finding the Fourth Proportional to 43,428.51, 65,146.41 and 13,850.55

Step by Step Solution

1. Step 1: Write the proportion equation
   43,428.51 : 65,146.41 = 13,850.55 : x
2. Step 2: Convert to fraction form
   43,428.51/65,146.41 = 13,850.55/x
3. Step 3: Cross multiply
   43,428.51x = 65,146.41 × 13,850.55
4. Step 4: Simplify right side
   43,428.51x = 902,313,609.03
5. Step 5: Solve for x
   x = 902,313,609.03/43,428.51
6. Step 6: Final answer
   x = 20,776.99