Finding the Fourth Proportional to 10,636.71, 14,698.90 and 7,979.51

Step by Step Solution

1. Step 1: Write the proportion equation
   10,636.71 : 14,698.90 = 7,979.51 : x
2. Step 2: Convert to fraction form
   10,636.71/14,698.90 = 7,979.51/x
3. Step 3: Cross multiply
   10,636.71x = 14,698.90 × 7,979.51
4. Step 4: Simplify right side
   10,636.71x = 117,290,019.54
5. Step 5: Solve for x
   x = 117,290,019.54/10,636.71
6. Step 6: Final answer
   x = 11,026.91