Finding the Fourth Proportional to 12,191.15, 18,284.85 and 3,870.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,191.15 : 18,284.85 = 3,870.08 : x
2. Step 2: Convert to fraction form
   12,191.15/18,284.85 = 3,870.08/x
3. Step 3: Cross multiply
   12,191.15x = 18,284.85 × 3,870.08
4. Step 4: Simplify right side
   12,191.15x = 70,763,740.86
5. Step 5: Solve for x
   x = 70,763,740.86/12,191.15
6. Step 6: Final answer
   x = 5,804.52