Finding the Fourth Proportional to 85,892.48, 128,809.56 and 33,287.84

Step by Step Solution

1. Step 1: Write the proportion equation
   85,892.48 : 128,809.56 = 33,287.84 : x
2. Step 2: Convert to fraction form
   85,892.48/128,809.56 = 33,287.84/x
3. Step 3: Cross multiply
   85,892.48x = 128,809.56 × 33,287.84
4. Step 4: Simplify right side
   85,892.48x = 4,287,792,023.75
5. Step 5: Solve for x
   x = 4,287,792,023.75/85,892.48
6. Step 6: Final answer
   x = 49,920.46