Finding the Fourth Proportional to 12,281.58, 18,423.72 and 5,709.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,281.58 : 18,423.72 = 5,709.78 : x
2. Step 2: Convert to fraction form
   12,281.58/18,423.72 = 5,709.78/x
3. Step 3: Cross multiply
   12,281.58x = 18,423.72 × 5,709.78
4. Step 4: Simplify right side
   12,281.58x = 105,195,387.98
5. Step 5: Solve for x
   x = 105,195,387.98/12,281.58
6. Step 6: Final answer
   x = 8,565.30