Finding the Fourth Proportional to 20,729.49, 31,099.60 and 5,939.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,729.49 : 31,099.60 = 5,939.50 : x
2. Step 2: Convert to fraction form
   20,729.49/31,099.60 = 5,939.50/x
3. Step 3: Cross multiply
   20,729.49x = 31,099.60 × 5,939.50
4. Step 4: Simplify right side
   20,729.49x = 184,715,918.70
5. Step 5: Solve for x
   x = 184,715,918.70/20,729.49
6. Step 6: Final answer
   x = 8,910.78