Finding the Fourth Proportional to 8,709.78, 12,019.72 and 4,731.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,709.78 : 12,019.72 = 4,731.12 : x
2. Step 2: Convert to fraction form
   8,709.78/12,019.72 = 4,731.12/x
3. Step 3: Cross multiply
   8,709.78x = 12,019.72 × 4,731.12
4. Step 4: Simplify right side
   8,709.78x = 56,866,737.69
5. Step 5: Solve for x
   x = 56,866,737.69/8,709.78
6. Step 6: Final answer
   x = 6,529.07