Finding the Fourth Proportional to 12,190.15, 18,285.86 and 3,870.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,190.15 : 18,285.86 = 3,870.82 : x
2. Step 2: Convert to fraction form
   12,190.15/18,285.86 = 3,870.82/x
3. Step 3: Cross multiply
   12,190.15x = 18,285.86 × 3,870.82
4. Step 4: Simplify right side
   12,190.15x = 70,781,305.14
5. Step 5: Solve for x
   x = 70,781,305.14/12,190.15
6. Step 6: Final answer
   x = 5,806.43