Finding the Fourth Proportional to 39,930.65, 55,104.03 and 21,782.37

Step by Step Solution

1. Step 1: Write the proportion equation
   39,930.65 : 55,104.03 = 21,782.37 : x
2. Step 2: Convert to fraction form
   39,930.65/55,104.03 = 21,782.37/x
3. Step 3: Cross multiply
   39,930.65x = 55,104.03 × 21,782.37
4. Step 4: Simplify right side
   39,930.65x = 1,200,296,369.95
5. Step 5: Solve for x
   x = 1,200,296,369.95/39,930.65
6. Step 6: Final answer
   x = 30,059.53