Finding the Fourth Proportional to 12,099.56, 18,152.99 and 3,780.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,099.56 : 18,152.99 = 3,780.45 : x
2. Step 2: Convert to fraction form
   12,099.56/18,152.99 = 3,780.45/x
3. Step 3: Cross multiply
   12,099.56x = 18,152.99 × 3,780.45
4. Step 4: Simplify right side
   12,099.56x = 68,626,452.14
5. Step 5: Solve for x
   x = 68,626,452.14/12,099.56
6. Step 6: Final answer
   x = 5,671.82