Finding the Fourth Proportional to 11,613.50, 17,423.13 and 3,405.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,613.50 : 17,423.13 = 3,405.50 : x
2. Step 2: Convert to fraction form
   11,613.50/17,423.13 = 3,405.50/x
3. Step 3: Cross multiply
   11,613.50x = 17,423.13 × 3,405.50
4. Step 4: Simplify right side
   11,613.50x = 59,334,469.22
5. Step 5: Solve for x
   x = 59,334,469.22/11,613.50
6. Step 6: Final answer
   x = 5,109.09