Finding the Fourth Proportional to 17,189.55, 23,689.46 and 13,406.76

Step by Step Solution

1. Step 1: Write the proportion equation
   17,189.55 : 23,689.46 = 13,406.76 : x
2. Step 2: Convert to fraction form
   17,189.55/23,689.46 = 13,406.76/x
3. Step 3: Cross multiply
   17,189.55x = 23,689.46 × 13,406.76
4. Step 4: Simplify right side
   17,189.55x = 317,598,938.27
5. Step 5: Solve for x
   x = 317,598,938.27/17,189.55
6. Step 6: Final answer
   x = 18,476.28