Finding the Fourth Proportional to 33,879.38, 46,775.48 and 21,785.31

Step by Step Solution

1. Step 1: Write the proportion equation
   33,879.38 : 46,775.48 = 21,785.31 : x
2. Step 2: Convert to fraction form
   33,879.38/46,775.48 = 21,785.31/x
3. Step 3: Cross multiply
   33,879.38x = 46,775.48 × 21,785.31
4. Step 4: Simplify right side
   33,879.38x = 1,019,018,223.27
5. Step 5: Solve for x
   x = 1,019,018,223.27/33,879.38
6. Step 6: Final answer
   x = 30,077.83