Finding the Fourth Proportional to 39,016.42, 53,842.65 and 21,111.42

Step by Step Solution

1. Step 1: Write the proportion equation
   39,016.42 : 53,842.65 = 21,111.42 : x
2. Step 2: Convert to fraction form
   39,016.42/53,842.65 = 21,111.42/x
3. Step 3: Cross multiply
   39,016.42x = 53,842.65 × 21,111.42
4. Step 4: Simplify right side
   39,016.42x = 1,136,694,904.46
5. Step 5: Solve for x
   x = 1,136,694,904.46/39,016.42
6. Step 6: Final answer
   x = 29,133.76