Finding the Fourth Proportional to 16,835.31, 23,231.81 and 9,281.63

Step by Step Solution

1. Step 1: Write the proportion equation
   16,835.31 : 23,231.81 = 9,281.63 : x
2. Step 2: Convert to fraction form
   16,835.31/23,231.81 = 9,281.63/x
3. Step 3: Cross multiply
   16,835.31x = 23,231.81 × 9,281.63
4. Step 4: Simplify right side
   16,835.31x = 215,629,145.93
5. Step 5: Solve for x
   x = 215,629,145.93/16,835.31
6. Step 6: Final answer
   x = 12,808.15