Finding the Fourth Proportional to 22,288.72, 30,746.90 and 15,116.20

Step by Step Solution

1. Step 1: Write the proportion equation
   22,288.72 : 30,746.90 = 15,116.20 : x
2. Step 2: Convert to fraction form
   22,288.72/30,746.90 = 15,116.20/x
3. Step 3: Cross multiply
   22,288.72x = 30,746.90 × 15,116.20
4. Step 4: Simplify right side
   22,288.72x = 464,776,289.78
5. Step 5: Solve for x
   x = 464,776,289.78/22,288.72
6. Step 6: Final answer
   x = 20,852.53