Finding the Fourth Proportional to 12,406.37, 18,610.76 and 4,086.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,406.37 : 18,610.76 = 4,086.45 : x
2. Step 2: Convert to fraction form
   12,406.37/18,610.76 = 4,086.45/x
3. Step 3: Cross multiply
   12,406.37x = 18,610.76 × 4,086.45
4. Step 4: Simplify right side
   12,406.37x = 76,051,950.42
5. Step 5: Solve for x
   x = 76,051,950.42/12,406.37
6. Step 6: Final answer
   x = 6,130.08