Finding the Fourth Proportional to 22,271.56, 30,734.98 and 12,840.12

Step by Step Solution

1. Step 1: Write the proportion equation
   22,271.56 : 30,734.98 = 12,840.12 : x
2. Step 2: Convert to fraction form
   22,271.56/30,734.98 = 12,840.12/x
3. Step 3: Cross multiply
   22,271.56x = 30,734.98 × 12,840.12
4. Step 4: Simplify right side
   22,271.56x = 394,640,831.40
5. Step 5: Solve for x
   x = 394,640,831.40/22,271.56
6. Step 6: Final answer
   x = 17,719.50