Finding the Fourth Proportional to 22,393.76, 30,906.23 and 12,960.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,393.76 : 30,906.23 = 12,960.50 : x
2. Step 2: Convert to fraction form
   22,393.76/30,906.23 = 12,960.50/x
3. Step 3: Cross multiply
   22,393.76x = 30,906.23 × 12,960.50
4. Step 4: Simplify right side
   22,393.76x = 400,559,974.58
5. Step 5: Solve for x
   x = 400,559,974.58/22,393.76
6. Step 6: Final answer
   x = 17,887.13