Finding the Fourth Proportional to 12,583.72, 18,874.42 and 4,262.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,583.72 : 18,874.42 = 4,262.78 : x
2. Step 2: Convert to fraction form
   12,583.72/18,874.42 = 4,262.78/x
3. Step 3: Cross multiply
   12,583.72x = 18,874.42 × 4,262.78
4. Step 4: Simplify right side
   12,583.72x = 80,457,500.09
5. Step 5: Solve for x
   x = 80,457,500.09/12,583.72
6. Step 6: Final answer
   x = 6,393.78