Finding the Fourth Proportional to 12,099.42, 18,146.06 and 3,780.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,099.42 : 18,146.06 = 3,780.28 : x
2. Step 2: Convert to fraction form
   12,099.42/18,146.06 = 3,780.28/x
3. Step 3: Cross multiply
   12,099.42x = 18,146.06 × 3,780.28
4. Step 4: Simplify right side
   12,099.42x = 68,597,123.43
5. Step 5: Solve for x
   x = 68,597,123.43/12,099.42
6. Step 6: Final answer
   x = 5,669.46