Finding the Fourth Proportional to 12,316.96, 17,005.60 and 9,479.33

Step by Step Solution

1. Step 1: Write the proportion equation
   12,316.96 : 17,005.60 = 9,479.33 : x
2. Step 2: Convert to fraction form
   12,316.96/17,005.60 = 9,479.33/x
3. Step 3: Cross multiply
   12,316.96x = 17,005.60 × 9,479.33
4. Step 4: Simplify right side
   12,316.96x = 161,201,631.52
5. Step 5: Solve for x
   x = 161,201,631.52/12,316.96
6. Step 6: Final answer
   x = 13,087.78