Finding the Fourth Proportional to 85,978.24, 128,934.61 and 33,375.49

Step by Step Solution

1. Step 1: Write the proportion equation
   85,978.24 : 128,934.61 = 33,375.49 : x
2. Step 2: Convert to fraction form
   85,978.24/128,934.61 = 33,375.49/x
3. Step 3: Cross multiply
   85,978.24x = 128,934.61 × 33,375.49
4. Step 4: Simplify right side
   85,978.24x = 4,303,255,786.71
5. Step 5: Solve for x
   x = 4,303,255,786.71/85,978.24
6. Step 6: Final answer
   x = 50,050.52