Finding the Fourth Proportional to 31,860.50, 43,913.30 and 21,771.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,860.50 : 43,913.30 = 21,771.42 : x
2. Step 2: Convert to fraction form
   31,860.50/43,913.30 = 21,771.42/x
3. Step 3: Cross multiply
   31,860.50x = 43,913.30 × 21,771.42
4. Step 4: Simplify right side
   31,860.50x = 956,054,897.89
5. Step 5: Solve for x
   x = 956,054,897.89/31,860.50
6. Step 6: Final answer
   x = 30,007.53