Finding the Fourth Proportional to 8,872.38, 12,245.32 and 5,287.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,872.38 : 12,245.32 = 5,287.50 : x
2. Step 2: Convert to fraction form
   8,872.38/12,245.32 = 5,287.50/x
3. Step 3: Cross multiply
   8,872.38x = 12,245.32 × 5,287.50
4. Step 4: Simplify right side
   8,872.38x = 64,747,129.50
5. Step 5: Solve for x
   x = 64,747,129.50/8,872.38
6. Step 6: Final answer
   x = 7,297.61