Finding the Fourth Proportional to 21,119.74, 31,683.56 and 7,796.20

Step by Step Solution

1. Step 1: Write the proportion equation
   21,119.74 : 31,683.56 = 7,796.20 : x
2. Step 2: Convert to fraction form
   21,119.74/31,683.56 = 7,796.20/x
3. Step 3: Cross multiply
   21,119.74x = 31,683.56 × 7,796.20
4. Step 4: Simplify right side
   21,119.74x = 247,011,311.69
5. Step 5: Solve for x
   x = 247,011,311.69/21,119.74
6. Step 6: Final answer
   x = 11,695.76