Finding the Fourth Proportional to 8,730.72, 12,044.88 and 5,742.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,730.72 : 12,044.88 = 5,742.72 : x
2. Step 2: Convert to fraction form
   8,730.72/12,044.88 = 5,742.72/x
3. Step 3: Cross multiply
   8,730.72x = 12,044.88 × 5,742.72
4. Step 4: Simplify right side
   8,730.72x = 69,170,373.27
5. Step 5: Solve for x
   x = 69,170,373.27/8,730.72
6. Step 6: Final answer
   x = 7,922.64