Finding the Fourth Proportional to 17,173.32, 23,658.72 and 16,139.96

Step by Step Solution

1. Step 1: Write the proportion equation
   17,173.32 : 23,658.72 = 16,139.96 : x
2. Step 2: Convert to fraction form
   17,173.32/23,658.72 = 16,139.96/x
3. Step 3: Cross multiply
   17,173.32x = 23,658.72 × 16,139.96
4. Step 4: Simplify right side
   17,173.32x = 381,850,928.22
5. Step 5: Solve for x
   x = 381,850,928.22/17,173.32
6. Step 6: Final answer
   x = 22,235.12