Finding the Fourth Proportional to 13,268.86, 19,904.00 and 3,408.21

Step by Step Solution

1. Step 1: Write the proportion equation
   13,268.86 : 19,904.00 = 3,408.21 : x
2. Step 2: Convert to fraction form
   13,268.86/19,904.00 = 3,408.21/x
3. Step 3: Cross multiply
   13,268.86x = 19,904.00 × 3,408.21
4. Step 4: Simplify right side
   13,268.86x = 67,836,994.80
5. Step 5: Solve for x
   x = 67,836,994.80/13,268.86
6. Step 6: Final answer
   x = 5,112.50