Finding the Fourth Proportional to 8,429.37, 12,660.45 and 6,870.52

Step by Step Solution

1. Step 1: Write the proportion equation
   8,429.37 : 12,660.45 = 6,870.52 : x
2. Step 2: Convert to fraction form
   8,429.37/12,660.45 = 6,870.52/x
3. Step 3: Cross multiply
   8,429.37x = 12,660.45 × 6,870.52
4. Step 4: Simplify right side
   8,429.37x = 86,983,874.93
5. Step 5: Solve for x
   x = 86,983,874.93/8,429.37
6. Step 6: Final answer
   x = 10,319.14