Finding the Fourth Proportional to 12,185.19, 18,278.72 and 3,865.68

Step by Step Solution

1. Step 1: Write the proportion equation
   12,185.19 : 18,278.72 = 3,865.68 : x
2. Step 2: Convert to fraction form
   12,185.19/18,278.72 = 3,865.68/x
3. Step 3: Cross multiply
   12,185.19x = 18,278.72 × 3,865.68
4. Step 4: Simplify right side
   12,185.19x = 70,659,663.00
5. Step 5: Solve for x
   x = 70,659,663.00/12,185.19
6. Step 6: Final answer
   x = 5,798.82