Finding the Fourth Proportional to 12,311.82, 18,460.31 and 5,187.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,311.82 : 18,460.31 = 5,187.56 : x
2. Step 2: Convert to fraction form
   12,311.82/18,460.31 = 5,187.56/x
3. Step 3: Cross multiply
   12,311.82x = 18,460.31 × 5,187.56
4. Step 4: Simplify right side
   12,311.82x = 95,763,847.50
5. Step 5: Solve for x
   x = 95,763,847.50/12,311.82
6. Step 6: Final answer
   x = 7,778.20