Finding the Fourth Proportional to 9,019.21, 12,446.42 and 4,986.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,019.21 : 12,446.42 = 4,986.30 : x
2. Step 2: Convert to fraction form
   9,019.21/12,446.42 = 4,986.30/x
3. Step 3: Cross multiply
   9,019.21x = 12,446.42 × 4,986.30
4. Step 4: Simplify right side
   9,019.21x = 62,061,584.05
5. Step 5: Solve for x
   x = 62,061,584.05/9,019.21
6. Step 6: Final answer
   x = 6,881.04