Finding the Fourth Proportional to 20,146.16, 30,215.64 and 7,667.48

Step by Step Solution

1. Step 1: Write the proportion equation
   20,146.16 : 30,215.64 = 7,667.48 : x
2. Step 2: Convert to fraction form
   20,146.16/30,215.64 = 7,667.48/x
3. Step 3: Cross multiply
   20,146.16x = 30,215.64 × 7,667.48
4. Step 4: Simplify right side
   20,146.16x = 231,677,815.39
5. Step 5: Solve for x
   x = 231,677,815.39/20,146.16
6. Step 6: Final answer
   x = 11,499.85