Finding the Fourth Proportional to 76,017.99, 104,907.78 and 50,480.31

Step by Step Solution

1. Step 1: Write the proportion equation
   76,017.99 : 104,907.78 = 50,480.31 : x
2. Step 2: Convert to fraction form
   76,017.99/104,907.78 = 50,480.31/x
3. Step 3: Cross multiply
   76,017.99x = 104,907.78 × 50,480.31
4. Step 4: Simplify right side
   76,017.99x = 5,295,777,003.41
5. Step 5: Solve for x
   x = 5,295,777,003.41/76,017.99
6. Step 6: Final answer
   x = 69,664.79