Finding the Fourth Proportional to 8,019.72, 12,013.20 and 4,722.84

Step by Step Solution

1. Step 1: Write the proportion equation
   8,019.72 : 12,013.20 = 4,722.84 : x
2. Step 2: Convert to fraction form
   8,019.72/12,013.20 = 4,722.84/x
3. Step 3: Cross multiply
   8,019.72x = 12,013.20 × 4,722.84
4. Step 4: Simplify right side
   8,019.72x = 56,736,421.49
5. Step 5: Solve for x
   x = 56,736,421.49/8,019.72
6. Step 6: Final answer
   x = 7,074.61