Finding the Fourth Proportional to 17,156.61, 23,686.83 and 13,169.79

Step by Step Solution

1. Step 1: Write the proportion equation
   17,156.61 : 23,686.83 = 13,169.79 : x
2. Step 2: Convert to fraction form
   17,156.61/23,686.83 = 13,169.79/x
3. Step 3: Cross multiply
   17,156.61x = 23,686.83 × 13,169.79
4. Step 4: Simplify right side
   17,156.61x = 311,950,576.87
5. Step 5: Solve for x
   x = 311,950,576.87/17,156.61
6. Step 6: Final answer
   x = 18,182.53