Finding the Fourth Proportional to 22,016.72, 30,378.84 and 12,583.28

Step by Step Solution

1. Step 1: Write the proportion equation
   22,016.72 : 30,378.84 = 12,583.28 : x
2. Step 2: Convert to fraction form
   22,016.72/30,378.84 = 12,583.28/x
3. Step 3: Cross multiply
   22,016.72x = 30,378.84 × 12,583.28
4. Step 4: Simplify right side
   22,016.72x = 382,265,449.80
5. Step 5: Solve for x
   x = 382,265,449.80/22,016.72
6. Step 6: Final answer
   x = 17,362.51