Finding the Fourth Proportional to 22,474.56, 31,016.88 and 12,405.18

Step by Step Solution

1. Step 1: Write the proportion equation
   22,474.56 : 31,016.88 = 12,405.18 : x
2. Step 2: Convert to fraction form
   22,474.56/31,016.88 = 12,405.18/x
3. Step 3: Cross multiply
   22,474.56x = 31,016.88 × 12,405.18
4. Step 4: Simplify right side
   22,474.56x = 384,769,979.44
5. Step 5: Solve for x
   x = 384,769,979.44/22,474.56
6. Step 6: Final answer
   x = 17,120.25