Finding the Fourth Proportional to 16,613.91, 22,916.12 and 13,250.79

Step by Step Solution

1. Step 1: Write the proportion equation
   16,613.91 : 22,916.12 = 13,250.79 : x
2. Step 2: Convert to fraction form
   16,613.91/22,916.12 = 13,250.79/x
3. Step 3: Cross multiply
   16,613.91x = 22,916.12 × 13,250.79
4. Step 4: Simplify right side
   16,613.91x = 303,656,627.48
5. Step 5: Solve for x
   x = 303,656,627.48/16,613.91
6. Step 6: Final answer
   x = 18,277.25