Finding the Fourth Proportional to 23,840, 32,899.20 and 13,231.34

Step by Step Solution

1. Step 1: Write the proportion equation
   23,840 : 32,899.20 = 13,231.34 : x
2. Step 2: Convert to fraction form
   23,840/32,899.20 = 13,231.34/x
3. Step 3: Cross multiply
   23,840x = 32,899.20 × 13,231.34
4. Step 4: Simplify right side
   23,840x = 435,300,500.93
5. Step 5: Solve for x
   x = 435,300,500.93/23,840
6. Step 6: Final answer
   x = 18,259.25