Finding the Fourth Proportional to 20,706.50, 31,061.37 and 6,855.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,706.50 : 31,061.37 = 6,855.50 : x
2. Step 2: Convert to fraction form
   20,706.50/31,061.37 = 6,855.50/x
3. Step 3: Cross multiply
   20,706.50x = 31,061.37 × 6,855.50
4. Step 4: Simplify right side
   20,706.50x = 212,941,222.04
5. Step 5: Solve for x
   x = 212,941,222.04/20,706.50
6. Step 6: Final answer
   x = 10,283.79