Finding the Fourth Proportional to 21,185.56, 31,768.23 and 7,849.40

Step by Step Solution

1. Step 1: Write the proportion equation
   21,185.56 : 31,768.23 = 7,849.40 : x
2. Step 2: Convert to fraction form
   21,185.56/31,768.23 = 7,849.40/x
3. Step 3: Cross multiply
   21,185.56x = 31,768.23 × 7,849.40
4. Step 4: Simplify right side
   21,185.56x = 249,361,544.56
5. Step 5: Solve for x
   x = 249,361,544.56/21,185.56
6. Step 6: Final answer
   x = 11,770.36