Finding the Fourth Proportional to 22,740.16, 31,381.47 and 13,181.89

Step by Step Solution

1. Step 1: Write the proportion equation
   22,740.16 : 31,381.47 = 13,181.89 : x
2. Step 2: Convert to fraction form
   22,740.16/31,381.47 = 13,181.89/x
3. Step 3: Cross multiply
   22,740.16x = 31,381.47 × 13,181.89
4. Step 4: Simplify right side
   22,740.16x = 413,667,085.58
5. Step 5: Solve for x
   x = 413,667,085.58/22,740.16
6. Step 6: Final answer
   x = 18,191.04