Finding the Fourth Proportional to 21,167.98, 31,740.62 and 7,123.34

Step by Step Solution

1. Step 1: Write the proportion equation
   21,167.98 : 31,740.62 = 7,123.34 : x
2. Step 2: Convert to fraction form
   21,167.98/31,740.62 = 7,123.34/x
3. Step 3: Cross multiply
   21,167.98x = 31,740.62 × 7,123.34
4. Step 4: Simplify right side
   21,167.98x = 226,099,087.18
5. Step 5: Solve for x
   x = 226,099,087.18/21,167.98
6. Step 6: Final answer
   x = 10,681.19