Finding the Fourth Proportional to 12,570.99, 18,855.89 and 4,251.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,570.99 : 18,855.89 = 4,251.34 : x
2. Step 2: Convert to fraction form
   12,570.99/18,855.89 = 4,251.34/x
3. Step 3: Cross multiply
   12,570.99x = 18,855.89 × 4,251.34
4. Step 4: Simplify right side
   12,570.99x = 80,162,799.39
5. Step 5: Solve for x
   x = 80,162,799.39/12,570.99
6. Step 6: Final answer
   x = 6,376.81