Finding the Fourth Proportional to 12,435.58, 17,162.34 and 9,286.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,435.58 : 17,162.34 = 9,286.30 : x
2. Step 2: Convert to fraction form
   12,435.58/17,162.34 = 9,286.30/x
3. Step 3: Cross multiply
   12,435.58x = 17,162.34 × 9,286.30
4. Step 4: Simplify right side
   12,435.58x = 159,374,637.94
5. Step 5: Solve for x
   x = 159,374,637.94/12,435.58
6. Step 6: Final answer
   x = 12,816.02