Finding the Fourth Proportional to 20,145.01, 30,230.64 and 7,665.15

Step by Step Solution

1. Step 1: Write the proportion equation
   20,145.01 : 30,230.64 = 7,665.15 : x
2. Step 2: Convert to fraction form
   20,145.01/30,230.64 = 7,665.15/x
3. Step 3: Cross multiply
   20,145.01x = 30,230.64 × 7,665.15
4. Step 4: Simplify right side
   20,145.01x = 231,722,276.83
5. Step 5: Solve for x
   x = 231,722,276.83/20,145.01
6. Step 6: Final answer
   x = 11,502.71