Finding the Fourth Proportional to 81,968.80, 113,056.32 and 50,111.68

Step by Step Solution

1. Step 1: Write the proportion equation
   81,968.80 : 113,056.32 = 50,111.68 : x
2. Step 2: Convert to fraction form
   81,968.80/113,056.32 = 50,111.68/x
3. Step 3: Cross multiply
   81,968.80x = 113,056.32 × 50,111.68
4. Step 4: Simplify right side
   81,968.80x = 5,665,442,129.82
5. Step 5: Solve for x
   x = 5,665,442,129.82/81,968.80
6. Step 6: Final answer
   x = 69,117.06