Finding the Fourth Proportional to 21,565.34, 29,741.82 and 13,065.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,565.34 : 29,741.82 = 13,065.50 : x
2. Step 2: Convert to fraction form
   21,565.34/29,741.82 = 13,065.50/x
3. Step 3: Cross multiply
   21,565.34x = 29,741.82 × 13,065.50
4. Step 4: Simplify right side
   21,565.34x = 388,591,749.21
5. Step 5: Solve for x
   x = 388,591,749.21/21,565.34
6. Step 6: Final answer
   x = 18,019.27