Finding the Fourth Proportional to 20,804.72, 31,192.49 and 7,655.38

Step by Step Solution

1. Step 1: Write the proportion equation
   20,804.72 : 31,192.49 = 7,655.38 : x
2. Step 2: Convert to fraction form
   20,804.72/31,192.49 = 7,655.38/x
3. Step 3: Cross multiply
   20,804.72x = 31,192.49 × 7,655.38
4. Step 4: Simplify right side
   20,804.72x = 238,790,305.25
5. Step 5: Solve for x
   x = 238,790,305.25/20,804.72
6. Step 6: Final answer
   x = 11,477.70