Finding the Fourth Proportional to 31,559.72, 43,554.55 and 18,136.33

Step by Step Solution

1. Step 1: Write the proportion equation
   31,559.72 : 43,554.55 = 18,136.33 : x
2. Step 2: Convert to fraction form
   31,559.72/43,554.55 = 18,136.33/x
3. Step 3: Cross multiply
   31,559.72x = 43,554.55 × 18,136.33
4. Step 4: Simplify right side
   31,559.72x = 789,919,605.59
5. Step 5: Solve for x
   x = 789,919,605.59/31,559.72
6. Step 6: Final answer
   x = 25,029.36