Finding the Fourth Proportional to 21,072.77, 29,086.22 and 13,110.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,072.77 : 29,086.22 = 13,110.25 : x
2. Step 2: Convert to fraction form
   21,072.77/29,086.22 = 13,110.25/x
3. Step 3: Cross multiply
   21,072.77x = 29,086.22 × 13,110.25
4. Step 4: Simplify right side
   21,072.77x = 381,327,615.76
5. Step 5: Solve for x
   x = 381,327,615.76/21,072.77
6. Step 6: Final answer
   x = 18,095.75