Finding the Fourth Proportional to 19,667.48, 29,479.91 and 9,679.10

Step by Step Solution

1. Step 1: Write the proportion equation
   19,667.48 : 29,479.91 = 9,679.10 : x
2. Step 2: Convert to fraction form
   19,667.48/29,479.91 = 9,679.10/x
3. Step 3: Cross multiply
   19,667.48x = 29,479.91 × 9,679.10
4. Step 4: Simplify right side
   19,667.48x = 285,338,801.09
5. Step 5: Solve for x
   x = 285,338,801.09/19,667.48
6. Step 6: Final answer
   x = 14,508.16