Finding the Fourth Proportional to 16,213.37, 22,372.27 and 9,407.21

Step by Step Solution

1. Step 1: Write the proportion equation
   16,213.37 : 22,372.27 = 9,407.21 : x
2. Step 2: Convert to fraction form
   16,213.37/22,372.27 = 9,407.21/x
3. Step 3: Cross multiply
   16,213.37x = 22,372.27 × 9,407.21
4. Step 4: Simplify right side
   16,213.37x = 210,460,506.69
5. Step 5: Solve for x
   x = 210,460,506.69/16,213.37
6. Step 6: Final answer
   x = 12,980.68