Finding the Fourth Proportional to 16,215.32, 22,376.96 and 9,144.04

Step by Step Solution

1. Step 1: Write the proportion equation
   16,215.32 : 22,376.96 = 9,144.04 : x
2. Step 2: Convert to fraction form
   16,215.32/22,376.96 = 9,144.04/x
3. Step 3: Cross multiply
   16,215.32x = 22,376.96 × 9,144.04
4. Step 4: Simplify right side
   16,215.32x = 204,615,817.32
5. Step 5: Solve for x
   x = 204,615,817.32/16,215.32
6. Step 6: Final answer
   x = 12,618.67