Finding the Fourth Proportional to 52,105.26, 78,105.90 and 20,495.54

Step by Step Solution

1. Step 1: Write the proportion equation
   52,105.26 : 78,105.90 = 20,495.54 : x
2. Step 2: Convert to fraction form
   52,105.26/78,105.90 = 20,495.54/x
3. Step 3: Cross multiply
   52,105.26x = 78,105.90 × 20,495.54
4. Step 4: Simplify right side
   52,105.26x = 1,600,822,597.69
5. Step 5: Solve for x
   x = 1,600,822,597.69/52,105.26
6. Step 6: Final answer
   x = 30,722.86