Finding the Fourth Proportional to 21,099.83, 31,654.19 and 7,952.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,099.83 : 31,654.19 = 7,952.31 : x
2. Step 2: Convert to fraction form
   21,099.83/31,654.19 = 7,952.31/x
3. Step 3: Cross multiply
   21,099.83x = 31,654.19 × 7,952.31
4. Step 4: Simplify right side
   21,099.83x = 251,723,951.56
5. Step 5: Solve for x
   x = 251,723,951.56/21,099.83
6. Step 6: Final answer
   x = 11,930.14