Finding the Fourth Proportional to 20,456.10, 30,619.35 and 14,624.10

Step by Step Solution

1. Step 1: Write the proportion equation
   20,456.10 : 30,619.35 = 14,624.10 : x
2. Step 2: Convert to fraction form
   20,456.10/30,619.35 = 14,624.10/x
3. Step 3: Cross multiply
   20,456.10x = 30,619.35 × 14,624.10
4. Step 4: Simplify right side
   20,456.10x = 447,780,436.34
5. Step 5: Solve for x
   x = 447,780,436.34/20,456.10
6. Step 6: Final answer
   x = 21,889.82