Finding the Fourth Proportional to 22,667.21, 31,271.80 and 13,105.35

Step by Step Solution

1. Step 1: Write the proportion equation
   22,667.21 : 31,271.80 = 13,105.35 : x
2. Step 2: Convert to fraction form
   22,667.21/31,271.80 = 13,105.35/x
3. Step 3: Cross multiply
   22,667.21x = 31,271.80 × 13,105.35
4. Step 4: Simplify right side
   22,667.21x = 409,827,851.37
5. Step 5: Solve for x
   x = 409,827,851.37/22,667.21
6. Step 6: Final answer
   x = 18,080.21