Finding the Fourth Proportional to 81,006.72, 111,783.96 and 50,790.75

Step by Step Solution

1. Step 1: Write the proportion equation
   81,006.72 : 111,783.96 = 50,790.75 : x
2. Step 2: Convert to fraction form
   81,006.72/111,783.96 = 50,790.75/x
3. Step 3: Cross multiply
   81,006.72x = 111,783.96 × 50,790.75
4. Step 4: Simplify right side
   81,006.72x = 5,677,591,166.37
5. Step 5: Solve for x
   x = 5,677,591,166.37/81,006.72
6. Step 6: Final answer
   x = 70,087.90