Finding the Fourth Proportional to 12,362.86, 17,054.31 and 8,120.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,362.86 : 17,054.31 = 8,120.89 : x
2. Step 2: Convert to fraction form
   12,362.86/17,054.31 = 8,120.89/x
3. Step 3: Cross multiply
   12,362.86x = 17,054.31 × 8,120.89
4. Step 4: Simplify right side
   12,362.86x = 138,496,175.54
5. Step 5: Solve for x
   x = 138,496,175.54/12,362.86
6. Step 6: Final answer
   x = 11,202.60