Finding the Fourth Proportional to 85,969.72, 128,932.71 and 33,350.50

Step by Step Solution

1. Step 1: Write the proportion equation
   85,969.72 : 128,932.71 = 33,350.50 : x
2. Step 2: Convert to fraction form
   85,969.72/128,932.71 = 33,350.50/x
3. Step 3: Cross multiply
   85,969.72x = 128,932.71 × 33,350.50
4. Step 4: Simplify right side
   85,969.72x = 4,299,970,344.86
5. Step 5: Solve for x
   x = 4,299,970,344.86/85,969.72
6. Step 6: Final answer
   x = 50,017.27