Finding the Fourth Proportional to 21,051.96, 31,556.82 and 7,191.48

Step by Step Solution

1. Step 1: Write the proportion equation
   21,051.96 : 31,556.82 = 7,191.48 : x
2. Step 2: Convert to fraction form
   21,051.96/31,556.82 = 7,191.48/x
3. Step 3: Cross multiply
   21,051.96x = 31,556.82 × 7,191.48
4. Step 4: Simplify right side
   21,051.96x = 226,940,239.89
5. Step 5: Solve for x
   x = 226,940,239.89/21,051.96
6. Step 6: Final answer
   x = 10,780.01