Finding the Fourth Proportional to 13,404.24, 20,108.68 and 4,518.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,404.24 : 20,108.68 = 4,518.72 : x
2. Step 2: Convert to fraction form
   13,404.24/20,108.68 = 4,518.72/x
3. Step 3: Cross multiply
   13,404.24x = 20,108.68 × 4,518.72
4. Step 4: Simplify right side
   13,404.24x = 90,865,494.49
5. Step 5: Solve for x
   x = 90,865,494.49/13,404.24
6. Step 6: Final answer
   x = 6,778.86