Finding the Fourth Proportional to 78,465.89, 108,181.29 and 50,821.37

Step by Step Solution

1. Step 1: Write the proportion equation
   78,465.89 : 108,181.29 = 50,821.37 : x
2. Step 2: Convert to fraction form
   78,465.89/108,181.29 = 50,821.37/x
3. Step 3: Cross multiply
   78,465.89x = 108,181.29 × 50,821.37
4. Step 4: Simplify right side
   78,465.89x = 5,497,921,087.54
5. Step 5: Solve for x
   x = 5,497,921,087.54/78,465.89
6. Step 6: Final answer
   x = 70,067.66