Finding the Fourth Proportional to 10,419.89, 15,629.86 and 2,628.70

Step by Step Solution

1. Step 1: Write the proportion equation
   10,419.89 : 15,629.86 = 2,628.70 : x
2. Step 2: Convert to fraction form
   10,419.89/15,629.86 = 2,628.70/x
3. Step 3: Cross multiply
   10,419.89x = 15,629.86 × 2,628.70
4. Step 4: Simplify right side
   10,419.89x = 41,086,265.11
5. Step 5: Solve for x
   x = 41,086,265.11/10,419.89
6. Step 6: Final answer
   x = 3,943.06