Finding the Fourth Proportional to 20,796.84, 31,180.68 and 7,647.48

Step by Step Solution

1. Step 1: Write the proportion equation
   20,796.84 : 31,180.68 = 7,647.48 : x
2. Step 2: Convert to fraction form
   20,796.84/31,180.68 = 7,647.48/x
3. Step 3: Cross multiply
   20,796.84x = 31,180.68 × 7,647.48
4. Step 4: Simplify right side
   20,796.84x = 238,453,626.69
5. Step 5: Solve for x
   x = 238,453,626.69/20,796.84
6. Step 6: Final answer
   x = 11,465.86