Finding the Fourth Proportional to 8,760.63, 12,089.67 and 5,225.89

Step by Step Solution

1. Step 1: Write the proportion equation
   8,760.63 : 12,089.67 = 5,225.89 : x
2. Step 2: Convert to fraction form
   8,760.63/12,089.67 = 5,225.89/x
3. Step 3: Cross multiply
   8,760.63x = 12,089.67 × 5,225.89
4. Step 4: Simplify right side
   8,760.63x = 63,179,285.56
5. Step 5: Solve for x
   x = 63,179,285.56/8,760.63
6. Step 6: Final answer
   x = 7,211.73