Finding the Fourth Proportional to 21,066.27, 29,077.26 and 13,103.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,066.27 : 29,077.26 = 13,103.76 : x
2. Step 2: Convert to fraction form
   21,066.27/29,077.26 = 13,103.76/x
3. Step 3: Cross multiply
   21,066.27x = 29,077.26 × 13,103.76
4. Step 4: Simplify right side
   21,066.27x = 381,021,436.50
5. Step 5: Solve for x
   x = 381,021,436.50/21,066.27
6. Step 6: Final answer
   x = 18,086.80