Finding the Fourth Proportional to 16,719.32, 23,072.60 and 9,165.96

Step by Step Solution

1. Step 1: Write the proportion equation
   16,719.32 : 23,072.60 = 9,165.96 : x
2. Step 2: Convert to fraction form
   16,719.32/23,072.60 = 9,165.96/x
3. Step 3: Cross multiply
   16,719.32x = 23,072.60 × 9,165.96
4. Step 4: Simplify right side
   16,719.32x = 211,482,551.61
5. Step 5: Solve for x
   x = 211,482,551.61/16,719.32
6. Step 6: Final answer
   x = 12,649.00