Finding the Fourth Proportional to 21,168.73, 31,741.75 and 7,124.09

Step by Step Solution

1. Step 1: Write the proportion equation
   21,168.73 : 31,741.75 = 7,124.09 : x
2. Step 2: Convert to fraction form
   21,168.73/31,741.75 = 7,124.09/x
3. Step 3: Cross multiply
   21,168.73x = 31,741.75 × 7,124.09
4. Step 4: Simplify right side
   21,168.73x = 226,130,889.43
5. Step 5: Solve for x
   x = 226,130,889.43/21,168.73
6. Step 6: Final answer
   x = 10,682.31