Finding the Fourth Proportional to 21,172.86, 31,760.84 and 7,132.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,172.86 : 31,760.84 = 7,132.82 : x
2. Step 2: Convert to fraction form
   21,172.86/31,760.84 = 7,132.82/x
3. Step 3: Cross multiply
   21,172.86x = 31,760.84 × 7,132.82
4. Step 4: Simplify right side
   21,172.86x = 226,544,213.80
5. Step 5: Solve for x
   x = 226,544,213.80/21,172.86
6. Step 6: Final answer
   x = 10,699.75