Finding the Fourth Proportional to 51,205.82, 76,821.69 and 21,608.42

Step by Step Solution

1. Step 1: Write the proportion equation
   51,205.82 : 76,821.69 = 21,608.42 : x
2. Step 2: Convert to fraction form
   51,205.82/76,821.69 = 21,608.42/x
3. Step 3: Cross multiply
   51,205.82x = 76,821.69 × 21,608.42
4. Step 4: Simplify right side
   51,205.82x = 1,659,995,342.63
5. Step 5: Solve for x
   x = 1,659,995,342.63/51,205.82
6. Step 6: Final answer
   x = 32,418.10