Finding the Fourth Proportional to 13,426.38, 20,136.53 and 5,103.43

Step by Step Solution

1. Step 1: Write the proportion equation
   13,426.38 : 20,136.53 = 5,103.43 : x
2. Step 2: Convert to fraction form
   13,426.38/20,136.53 = 5,103.43/x
3. Step 3: Cross multiply
   13,426.38x = 20,136.53 × 5,103.43
4. Step 4: Simplify right side
   13,426.38x = 102,765,333.72
5. Step 5: Solve for x
   x = 102,765,333.72/13,426.38
6. Step 6: Final answer
   x = 7,653.99