Finding the Fourth Proportional to 12,270.96, 18,399.40 and 5,690.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,270.96 : 18,399.40 = 5,690.72 : x
2. Step 2: Convert to fraction form
   12,270.96/18,399.40 = 5,690.72/x
3. Step 3: Cross multiply
   12,270.96x = 18,399.40 × 5,690.72
4. Step 4: Simplify right side
   12,270.96x = 104,705,833.57
5. Step 5: Solve for x
   x = 104,705,833.57/12,270.96
6. Step 6: Final answer
   x = 8,532.82