Finding the Fourth Proportional to 13,268.64, 19,894.56 and 4,380.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,268.64 : 19,894.56 = 4,380.72 : x
2. Step 2: Convert to fraction form
   13,268.64/19,894.56 = 4,380.72/x
3. Step 3: Cross multiply
   13,268.64x = 19,894.56 × 4,380.72
4. Step 4: Simplify right side
   13,268.64x = 87,152,496.88
5. Step 5: Solve for x
   x = 87,152,496.88/13,268.64
6. Step 6: Final answer
   x = 6,568.31