Finding the Fourth Proportional to 22,563.69, 31,136.87 and 12,491.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,563.69 : 31,136.87 = 12,491.42 : x
2. Step 2: Convert to fraction form
   22,563.69/31,136.87 = 12,491.42/x
3. Step 3: Cross multiply
   22,563.69x = 31,136.87 × 12,491.42
4. Step 4: Simplify right side
   22,563.69x = 388,943,502.51
5. Step 5: Solve for x
   x = 388,943,502.51/22,563.69
6. Step 6: Final answer
   x = 17,237.58