Finding the Fourth Proportional to 12,463.89, 18,688.83 and 4,139.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,463.89 : 18,688.83 = 4,139.46 : x
2. Step 2: Convert to fraction form
   12,463.89/18,688.83 = 4,139.46/x
3. Step 3: Cross multiply
   12,463.89x = 18,688.83 × 4,139.46
4. Step 4: Simplify right side
   12,463.89x = 77,361,664.23
5. Step 5: Solve for x
   x = 77,361,664.23/12,463.89
6. Step 6: Final answer
   x = 6,206.86