Finding the Fourth Proportional to 9,019.85, 12,439.33 and 5,662.97

Step by Step Solution

1. Step 1: Write the proportion equation
   9,019.85 : 12,439.33 = 5,662.97 : x
2. Step 2: Convert to fraction form
   9,019.85/12,439.33 = 5,662.97/x
3. Step 3: Cross multiply
   9,019.85x = 12,439.33 × 5,662.97
4. Step 4: Simplify right side
   9,019.85x = 70,443,608.80
5. Step 5: Solve for x
   x = 70,443,608.80/9,019.85
6. Step 6: Final answer
   x = 7,809.84