Finding the Fourth Proportional to 16,362.96, 24,508.28 and 12,638.16

Step by Step Solution

1. Step 1: Write the proportion equation
   16,362.96 : 24,508.28 = 12,638.16 : x
2. Step 2: Convert to fraction form
   16,362.96/24,508.28 = 12,638.16/x
3. Step 3: Cross multiply
   16,362.96x = 24,508.28 × 12,638.16
4. Step 4: Simplify right side
   16,362.96x = 309,739,563.96
5. Step 5: Solve for x
   x = 309,739,563.96/16,362.96
6. Step 6: Final answer
   x = 18,929.31