Finding the Fourth Proportional to 13,404.42, 20,103.57 and 5,085.36

Step by Step Solution

1. Step 1: Write the proportion equation
   13,404.42 : 20,103.57 = 5,085.36 : x
2. Step 2: Convert to fraction form
   13,404.42/20,103.57 = 5,085.36/x
3. Step 3: Cross multiply
   13,404.42x = 20,103.57 × 5,085.36
4. Step 4: Simplify right side
   13,404.42x = 102,233,890.74
5. Step 5: Solve for x
   x = 102,233,890.74/13,404.42
6. Step 6: Final answer
   x = 7,626.88