Finding the Fourth Proportional to 21,086.05, 29,087.23 and 13,523.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,086.05 : 29,087.23 = 13,523.96 : x
2. Step 2: Convert to fraction form
   21,086.05/29,087.23 = 13,523.96/x
3. Step 3: Cross multiply
   21,086.05x = 29,087.23 × 13,523.96
4. Step 4: Simplify right side
   21,086.05x = 393,374,610.30
5. Step 5: Solve for x
   x = 393,374,610.30/21,086.05
6. Step 6: Final answer
   x = 18,655.68