Finding the Fourth Proportional to 20,148.64, 30,202.71 and 7,665.46

Step by Step Solution

1. Step 1: Write the proportion equation
   20,148.64 : 30,202.71 = 7,665.46 : x
2. Step 2: Convert to fraction form
   20,148.64/30,202.71 = 7,665.46/x
3. Step 3: Cross multiply
   20,148.64x = 30,202.71 × 7,665.46
4. Step 4: Simplify right side
   20,148.64x = 231,517,665.40
5. Step 5: Solve for x
   x = 231,517,665.40/20,148.64
6. Step 6: Final answer
   x = 11,490.49