Finding the Fourth Proportional to 20,733.05, 31,112.88 and 20,656.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,733.05 : 31,112.88 = 20,656.50 : x
2. Step 2: Convert to fraction form
   20,733.05/31,112.88 = 20,656.50/x
3. Step 3: Cross multiply
   20,733.05x = 31,112.88 × 20,656.50
4. Step 4: Simplify right side
   20,733.05x = 642,683,205.72
5. Step 5: Solve for x
   x = 642,683,205.72/20,733.05
6. Step 6: Final answer
   x = 30,998.01