Finding the Fourth Proportional to 39,044.48, 53,881.82 and 21,139.86

Step by Step Solution

1. Step 1: Write the proportion equation
   39,044.48 : 53,881.82 = 21,139.86 : x
2. Step 2: Convert to fraction form
   39,044.48/53,881.82 = 21,139.86/x
3. Step 3: Cross multiply
   39,044.48x = 53,881.82 × 21,139.86
4. Step 4: Simplify right side
   39,044.48x = 1,139,054,131.35
5. Step 5: Solve for x
   x = 1,139,054,131.35/39,044.48
6. Step 6: Final answer
   x = 29,173.24