Finding the Fourth Proportional to 13,786.12, 20,682.42 and 3,925.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,786.12 : 20,682.42 = 3,925.18 : x
2. Step 2: Convert to fraction form
   13,786.12/20,682.42 = 3,925.18/x
3. Step 3: Cross multiply
   13,786.12x = 20,682.42 × 3,925.18
4. Step 4: Simplify right side
   13,786.12x = 81,182,221.34
5. Step 5: Solve for x
   x = 81,182,221.34/13,786.12
6. Step 6: Final answer
   x = 5,888.69