Finding the Fourth Proportional to 13,729.09, 20,598.54 and 5,404.51

Step by Step Solution

1. Step 1: Write the proportion equation
   13,729.09 : 20,598.54 = 5,404.51 : x
2. Step 2: Convert to fraction form
   13,729.09/20,598.54 = 5,404.51/x
3. Step 3: Cross multiply
   13,729.09x = 20,598.54 × 5,404.51
4. Step 4: Simplify right side
   13,729.09x = 111,325,015.42
5. Step 5: Solve for x
   x = 111,325,015.42/13,729.09
6. Step 6: Final answer
   x = 8,108.70