Finding the Fourth Proportional to 39,005.88, 53,827.82 and 21,100.62

Step by Step Solution

1. Step 1: Write the proportion equation
   39,005.88 : 53,827.82 = 21,100.62 : x
2. Step 2: Convert to fraction form
   39,005.88/53,827.82 = 21,100.62/x
3. Step 3: Cross multiply
   39,005.88x = 53,827.82 × 21,100.62
4. Step 4: Simplify right side
   39,005.88x = 1,135,800,404.31
5. Step 5: Solve for x
   x = 1,135,800,404.31/39,005.88
6. Step 6: Final answer
   x = 29,118.70