Finding the Fourth Proportional to 22,388.56, 30,894.33 and 12,957.73

Step by Step Solution

1. Step 1: Write the proportion equation
   22,388.56 : 30,894.33 = 12,957.73 : x
2. Step 2: Convert to fraction form
   22,388.56/30,894.33 = 12,957.73/x
3. Step 3: Cross multiply
   22,388.56x = 30,894.33 × 12,957.73
4. Step 4: Simplify right side
   22,388.56x = 400,320,386.67
5. Step 5: Solve for x
   x = 400,320,386.67/22,388.56
6. Step 6: Final answer
   x = 17,880.58