Finding the Fourth Proportional to 39,959.82, 55,144.66 and 21,810.71

Step by Step Solution

1. Step 1: Write the proportion equation
   39,959.82 : 55,144.66 = 21,810.71 : x
2. Step 2: Convert to fraction form
   39,959.82/55,144.66 = 21,810.71/x
3. Step 3: Cross multiply
   39,959.82x = 55,144.66 × 21,810.71
4. Step 4: Simplify right side
   39,959.82x = 1,202,744,187.31
5. Step 5: Solve for x
   x = 1,202,744,187.31/39,959.82
6. Step 6: Final answer
   x = 30,098.84