Finding the Fourth Proportional to 10,477.50, 15,717.20 and 2,686.38

Step by Step Solution

1. Step 1: Write the proportion equation
   10,477.50 : 15,717.20 = 2,686.38 : x
2. Step 2: Convert to fraction form
   10,477.50/15,717.20 = 2,686.38/x
3. Step 3: Cross multiply
   10,477.50x = 15,717.20 × 2,686.38
4. Step 4: Simplify right side
   10,477.50x = 42,222,358.30
5. Step 5: Solve for x
   x = 42,222,358.30/10,477.50
6. Step 6: Final answer
   x = 4,029.81