Finding the Fourth Proportional to 16,678.10, 23,016.32 and 9,507.87

Step by Step Solution

1. Step 1: Write the proportion equation
   16,678.10 : 23,016.32 = 9,507.87 : x
2. Step 2: Convert to fraction form
   16,678.10/23,016.32 = 9,507.87/x
3. Step 3: Cross multiply
   16,678.10x = 23,016.32 × 9,507.87
4. Step 4: Simplify right side
   16,678.10x = 218,836,130.90
5. Step 5: Solve for x
   x = 218,836,130.90/16,678.10
6. Step 6: Final answer
   x = 13,121.17