Finding the Fourth Proportional to 23,171.69, 34,671.42 and 13,816.80

Step by Step Solution

1. Step 1: Write the proportion equation
   23,171.69 : 34,671.42 = 13,816.80 : x
2. Step 2: Convert to fraction form
   23,171.69/34,671.42 = 13,816.80/x
3. Step 3: Cross multiply
   23,171.69x = 34,671.42 × 13,816.80
4. Step 4: Simplify right side
   23,171.69x = 479,048,075.86
5. Step 5: Solve for x
   x = 479,048,075.86/23,171.69
6. Step 6: Final answer
   x = 20,673.85