Finding the Fourth Proportional to 39,016.65, 53,842.81 and 21,111.98

Step by Step Solution

1. Step 1: Write the proportion equation
   39,016.65 : 53,842.81 = 21,111.98 : x
2. Step 2: Convert to fraction form
   39,016.65/53,842.81 = 21,111.98/x
3. Step 3: Cross multiply
   39,016.65x = 53,842.81 × 21,111.98
4. Step 4: Simplify right side
   39,016.65x = 1,136,728,045.45
5. Step 5: Solve for x
   x = 1,136,728,045.45/39,016.65
6. Step 6: Final answer
   x = 29,134.43