Finding the Fourth Proportional to 22,215.28, 30,680.04 and 19,216.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,215.28 : 30,680.04 = 19,216.72 : x
2. Step 2: Convert to fraction form
   22,215.28/30,680.04 = 19,216.72/x
3. Step 3: Cross multiply
   22,215.28x = 30,680.04 × 19,216.72
4. Step 4: Simplify right side
   22,215.28x = 589,569,738.27
5. Step 5: Solve for x
   x = 589,569,738.27/22,215.28
6. Step 6: Final answer
   x = 26,538.93