Finding the Fourth Proportional to 13,926.43, 19,218.55 and 7,958.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,926.43 : 19,218.55 = 7,958.31 : x
2. Step 2: Convert to fraction form
   13,926.43/19,218.55 = 7,958.31/x
3. Step 3: Cross multiply
   13,926.43x = 19,218.55 × 7,958.31
4. Step 4: Simplify right side
   13,926.43x = 152,947,178.65
5. Step 5: Solve for x
   x = 152,947,178.65/13,926.43
6. Step 6: Final answer
   x = 10,982.52