Finding the Fourth Proportional to 8,140.66, 12,215.43 and 3,758.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,140.66 : 12,215.43 = 3,758.56 : x
2. Step 2: Convert to fraction form
   8,140.66/12,215.43 = 3,758.56/x
3. Step 3: Cross multiply
   8,140.66x = 12,215.43 × 3,758.56
4. Step 4: Simplify right side
   8,140.66x = 45,912,426.58
5. Step 5: Solve for x
   x = 45,912,426.58/8,140.66
6. Step 6: Final answer
   x = 5,639.89