Finding the Fourth Proportional to 12,211.16, 18,315.72 and 3,890.84

Step by Step Solution

1. Step 1: Write the proportion equation
   12,211.16 : 18,315.72 = 3,890.84 : x
2. Step 2: Convert to fraction form
   12,211.16/18,315.72 = 3,890.84/x
3. Step 3: Cross multiply
   12,211.16x = 18,315.72 × 3,890.84
4. Step 4: Simplify right side
   12,211.16x = 71,263,536.00
5. Step 5: Solve for x
   x = 71,263,536.00/12,211.16
6. Step 6: Final answer
   x = 5,835.93