Finding the Fourth Proportional to 13,747.58, 20,629.86 and 5,426.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,747.58 : 20,629.86 = 5,426.18 : x
2. Step 2: Convert to fraction form
   13,747.58/20,629.86 = 5,426.18/x
3. Step 3: Cross multiply
   13,747.58x = 20,629.86 × 5,426.18
4. Step 4: Simplify right side
   13,747.58x = 111,941,333.73
5. Step 5: Solve for x
   x = 111,941,333.73/13,747.58
6. Step 6: Final answer
   x = 8,142.62