Finding the Fourth Proportional to 12,809.18, 17,678.31 and 7,508.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,809.18 : 17,678.31 = 7,508.54 : x
2. Step 2: Convert to fraction form
   12,809.18/17,678.31 = 7,508.54/x
3. Step 3: Cross multiply
   12,809.18x = 17,678.31 × 7,508.54
4. Step 4: Simplify right side
   12,809.18x = 132,738,297.77
5. Step 5: Solve for x
   x = 132,738,297.77/12,809.18
6. Step 6: Final answer
   x = 10,362.75