Finding the Fourth Proportional to 22,812.37, 31,480.43 and 12,740.52

Step by Step Solution

1. Step 1: Write the proportion equation
   22,812.37 : 31,480.43 = 12,740.52 : x
2. Step 2: Convert to fraction form
   22,812.37/31,480.43 = 12,740.52/x
3. Step 3: Cross multiply
   22,812.37x = 31,480.43 × 12,740.52
4. Step 4: Simplify right side
   22,812.37x = 401,076,890.62
5. Step 5: Solve for x
   x = 401,076,890.62/22,812.37
6. Step 6: Final answer
   x = 17,581.55