Finding the Fourth Proportional to 12,011.31, 18,014.40 and 4,613.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,011.31 : 18,014.40 = 4,613.18 : x
2. Step 2: Convert to fraction form
   12,011.31/18,014.40 = 4,613.18/x
3. Step 3: Cross multiply
   12,011.31x = 18,014.40 × 4,613.18
4. Step 4: Simplify right side
   12,011.31x = 83,103,579.72
5. Step 5: Solve for x
   x = 83,103,579.72/12,011.31
6. Step 6: Final answer
   x = 6,918.78