Finding the Fourth Proportional to 22,562.81, 31,136.28 and 12,491.03

Step by Step Solution

1. Step 1: Write the proportion equation
   22,562.81 : 31,136.28 = 12,491.03 : x
2. Step 2: Convert to fraction form
   22,562.81/31,136.28 = 12,491.03/x
3. Step 3: Cross multiply
   22,562.81x = 31,136.28 × 12,491.03
4. Step 4: Simplify right side
   22,562.81x = 388,924,051.89
5. Step 5: Solve for x
   x = 388,924,051.89/22,562.81
6. Step 6: Final answer
   x = 17,237.40