Finding the Fourth Proportional to 71,958.47, 107,961.60 and 31,971.89

Step by Step Solution

1. Step 1: Write the proportion equation
   71,958.47 : 107,961.60 = 31,971.89 : x
2. Step 2: Convert to fraction form
   71,958.47/107,961.60 = 31,971.89/x
3. Step 3: Cross multiply
   71,958.47x = 107,961.60 × 31,971.89
4. Step 4: Simplify right side
   71,958.47x = 3,451,736,399.42
5. Step 5: Solve for x
   x = 3,451,736,399.42/71,958.47
6. Step 6: Final answer
   x = 47,968.45