Finding the Fourth Proportional to 12,079.86, 18,117.69 and 3,313.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,079.86 : 18,117.69 = 3,313.20 : x
2. Step 2: Convert to fraction form
   12,079.86/18,117.69 = 3,313.20/x
3. Step 3: Cross multiply
   12,079.86x = 18,117.69 × 3,313.20
4. Step 4: Simplify right side
   12,079.86x = 60,027,530.51
5. Step 5: Solve for x
   x = 60,027,530.51/12,079.86
6. Step 6: Final answer
   x = 4,969.22