Finding the Fourth Proportional to 21,957.76, 30,301.84 and 12,526.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,957.76 : 30,301.84 = 12,526.72 : x
2. Step 2: Convert to fraction form
   21,957.76/30,301.84 = 12,526.72/x
3. Step 3: Cross multiply
   21,957.76x = 30,301.84 × 12,526.72
4. Step 4: Simplify right side
   21,957.76x = 379,582,665.16
5. Step 5: Solve for x
   x = 379,582,665.16/21,957.76
6. Step 6: Final answer
   x = 17,286.95