Finding the Fourth Proportional to 19,920.82, 27,489.73 and 10,969.10

Step by Step Solution

1. Step 1: Write the proportion equation
   19,920.82 : 27,489.73 = 10,969.10 : x
2. Step 2: Convert to fraction form
   19,920.82/27,489.73 = 10,969.10/x
3. Step 3: Cross multiply
   19,920.82x = 27,489.73 × 10,969.10
4. Step 4: Simplify right side
   19,920.82x = 301,537,597.34
5. Step 5: Solve for x
   x = 301,537,597.34/19,920.82
6. Step 6: Final answer
   x = 15,136.81