Finding the Fourth Proportional to 21,162.42, 31,744.04 and 7,119.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,162.42 : 31,744.04 = 7,119.86 : x
2. Step 2: Convert to fraction form
   21,162.42/31,744.04 = 7,119.86/x
3. Step 3: Cross multiply
   21,162.42x = 31,744.04 × 7,119.86
4. Step 4: Simplify right side
   21,162.42x = 226,012,926.31
5. Step 5: Solve for x
   x = 226,012,926.31/21,162.42
6. Step 6: Final answer
   x = 10,679.92