Finding the Fourth Proportional to 12,958.01, 19,340.83 and 11,171.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,958.01 : 19,340.83 = 11,171.42 : x
2. Step 2: Convert to fraction form
   12,958.01/19,340.83 = 11,171.42/x
3. Step 3: Cross multiply
   12,958.01x = 19,340.83 × 11,171.42
4. Step 4: Simplify right side
   12,958.01x = 216,064,479.22
5. Step 5: Solve for x
   x = 216,064,479.22/12,958.01
6. Step 6: Final answer
   x = 16,674.20