Finding the Fourth Proportional to 12,009.12, 18,016.34 and 4,613.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,009.12 : 18,016.34 = 4,613.58 : x
2. Step 2: Convert to fraction form
   12,009.12/18,016.34 = 4,613.58/x
3. Step 3: Cross multiply
   12,009.12x = 18,016.34 × 4,613.58
4. Step 4: Simplify right side
   12,009.12x = 83,119,825.90
5. Step 5: Solve for x
   x = 83,119,825.90/12,009.12
6. Step 6: Final answer
   x = 6,921.39