Finding the Fourth Proportional to 39,036.67, 53,870.63 and 21,131.82

Step by Step Solution

1. Step 1: Write the proportion equation
   39,036.67 : 53,870.63 = 21,131.82 : x
2. Step 2: Convert to fraction form
   39,036.67/53,870.63 = 21,131.82/x
3. Step 3: Cross multiply
   39,036.67x = 53,870.63 × 21,131.82
4. Step 4: Simplify right side
   39,036.67x = 1,138,384,456.45
5. Step 5: Solve for x
   x = 1,138,384,456.45/39,036.67
6. Step 6: Final answer
   x = 29,161.93