Finding the Fourth Proportional to 43,009.14, 64,513.94 and 13,424.50

Step by Step Solution

1. Step 1: Write the proportion equation
   43,009.14 : 64,513.94 = 13,424.50 : x
2. Step 2: Convert to fraction form
   43,009.14/64,513.94 = 13,424.50/x
3. Step 3: Cross multiply
   43,009.14x = 64,513.94 × 13,424.50
4. Step 4: Simplify right side
   43,009.14x = 866,067,401.05
5. Step 5: Solve for x
   x = 866,067,401.05/43,009.14
6. Step 6: Final answer
   x = 20,136.82