Finding the Fourth Proportional to 22,505.69, 31,047.51 and 13,072.43

Step by Step Solution

1. Step 1: Write the proportion equation
   22,505.69 : 31,047.51 = 13,072.43 : x
2. Step 2: Convert to fraction form
   22,505.69/31,047.51 = 13,072.43/x
3. Step 3: Cross multiply
   22,505.69x = 31,047.51 × 13,072.43
4. Step 4: Simplify right side
   22,505.69x = 405,866,401.15
5. Step 5: Solve for x
   x = 405,866,401.15/22,505.69
6. Step 6: Final answer
   x = 18,033.95