Finding the Fourth Proportional to 21,764.27, 30,034.71 and 12,808.51

Step by Step Solution

1. Step 1: Write the proportion equation
   21,764.27 : 30,034.71 = 12,808.51 : x
2. Step 2: Convert to fraction form
   21,764.27/30,034.71 = 12,808.51/x
3. Step 3: Cross multiply
   21,764.27x = 30,034.71 × 12,808.51
4. Step 4: Simplify right side
   21,764.27x = 384,699,808.30
5. Step 5: Solve for x
   x = 384,699,808.30/21,764.27
6. Step 6: Final answer
   x = 17,675.75