Finding the Fourth Proportional to 12,381.88, 18,576.06 and 3,617.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,381.88 : 18,576.06 = 3,617.56 : x
2. Step 2: Convert to fraction form
   12,381.88/18,576.06 = 3,617.56/x
3. Step 3: Cross multiply
   12,381.88x = 18,576.06 × 3,617.56
4. Step 4: Simplify right side
   12,381.88x = 67,200,011.61
5. Step 5: Solve for x
   x = 67,200,011.61/12,381.88
6. Step 6: Final answer
   x = 5,427.29