Finding the Fourth Proportional to 16,215.60, 22,374.72 and 9,142.32

Step by Step Solution

1. Step 1: Write the proportion equation
   16,215.60 : 22,374.72 = 9,142.32 : x
2. Step 2: Convert to fraction form
   16,215.60/22,374.72 = 9,142.32/x
3. Step 3: Cross multiply
   16,215.60x = 22,374.72 × 9,142.32
4. Step 4: Simplify right side
   16,215.60x = 204,556,850.15
5. Step 5: Solve for x
   x = 204,556,850.15/16,215.60
6. Step 6: Final answer
   x = 12,614.82