Finding the Fourth Proportional to 38,713.98, 53,429.34 and 21,722.82

Step by Step Solution

1. Step 1: Write the proportion equation
   38,713.98 : 53,429.34 = 21,722.82 : x
2. Step 2: Convert to fraction form
   38,713.98/53,429.34 = 21,722.82/x
3. Step 3: Cross multiply
   38,713.98x = 53,429.34 × 21,722.82
4. Step 4: Simplify right side
   38,713.98x = 1,160,635,668.39
5. Step 5: Solve for x
   x = 1,160,635,668.39/38,713.98
6. Step 6: Final answer
   x = 29,979.76