Finding the Fourth Proportional to 13,199.31, 19,796.89 and 4,314.57

Step by Step Solution

1. Step 1: Write the proportion equation
   13,199.31 : 19,796.89 = 4,314.57 : x
2. Step 2: Convert to fraction form
   13,199.31/19,796.89 = 4,314.57/x
3. Step 3: Cross multiply
   13,199.31x = 19,796.89 × 4,314.57
4. Step 4: Simplify right side
   13,199.31x = 85,415,067.69
5. Step 5: Solve for x
   x = 85,415,067.69/13,199.31
6. Step 6: Final answer
   x = 6,471.18