Finding the Fourth Proportional to 22,604, 31,193.52 and 13,172.56

Step by Step Solution

1. Step 1: Write the proportion equation
   22,604 : 31,193.52 = 13,172.56 : x
2. Step 2: Convert to fraction form
   22,604/31,193.52 = 13,172.56/x
3. Step 3: Cross multiply
   22,604x = 31,193.52 × 13,172.56
4. Step 4: Simplify right side
   22,604x = 410,898,513.81
5. Step 5: Solve for x
   x = 410,898,513.81/22,604
6. Step 6: Final answer
   x = 18,178.13